diff --git a/src/game/g_net.pas b/src/game/g_net.pas
index dc3671261ad05f0fe27ee815ca47684f5a3e3a74..60d91c110a118bfe840059d4ffd01035a84ee95c 100644 (file)
--- a/src/game/g_net.pas
+++ b/src/game/g_net.pas
interface
uses
- e_log, e_msg, ENet, Classes, MAPDEF{$IFDEF USE_MINIUPNPC}, miniupnpc;{$ELSE};{$ENDIF}
+ e_log, e_msg, ENet, Classes, md5, MAPDEF{$IFDEF USE_MINIUPNPC}, miniupnpc;{$ELSE};{$ENDIF}
const
NET_PROTOCOL_VER = 181;
NET_MAXCLIENTS = 24;
- NET_CHANS = 11;
+ NET_CHANS = 12;
NET_CHAN_SERVICE = 0;
NET_CHAN_IMPORTANT = 1;
NET_CHAN_CHAT = 8;
NET_CHAN_DOWNLOAD = 9;
NET_CHAN_SHOTS = 10;
+ NET_CHAN_DOWNLOAD_EX = 11;
NET_NONE = 0;
NET_SERVER = 1;
NET_DISC_TEMPBAN: enet_uint32 = 7;
NET_DISC_BAN: enet_uint32 = 8;
NET_DISC_MAX: enet_uint32 = 8;
+ NET_DISC_FILE_TIMEOUT: enet_uint32 = 13;
NET_STATE_NONE = 0;
NET_STATE_AUTH = 1;
{$ENDIF}
type
+ TNetFileTransfer = record
+ diskName: string;
+ hash: TMD5Digest;
+ stream: TStream;
+ size: Integer; // file size in bytes
+ chunkSize: Integer;
+ lastSentChunk: Integer;
+ lastAckChunk: Integer;
+ lastAckTime: Int64; // msecs; if not "in progress", we're waiting for the first ack
+ inProgress: Boolean;
+ diskBuffer: PChar; // of `chunkSize` bytes
+ end;
+
TNetClient = record
ID: Byte;
Used: Boolean;
RequestedFullUpdate: Boolean;
RCONAuth: Boolean;
Voted: Boolean;
+ Transfer: TNetFileTransfer; // only one transfer may be active
NetOut: array [0..1] of TMsg;
end;
TBanRecord = record
function g_Net_ClientName_ByID(ID: Integer): string;
procedure g_Net_SendData(Data: AByte; peer: pENetPeer; Reliable: Boolean; Chan: Byte = NET_CHAN_DOWNLOAD);
-function g_Net_Wait_Event(msgId: Word): TMemoryStream;
+//function g_Net_Wait_Event(msgId: Word): TMemoryStream;
+//function g_Net_Wait_FileInfo (var tf: TNetFileTransfer; asMap: Boolean; out resList: TStringList): Integer;
function IpToStr(IP: LongWord): string;
function StrToIp(IPstr: string; var IP: LongWord): Boolean;
function g_Net_ForwardPorts(ForwardPongPort: Boolean = True): Boolean;
procedure g_Net_UnforwardPorts();
+function g_Net_UserRequestExit: Boolean;
+
+function g_Net_SendMapRequest (): Boolean;
+function g_Net_Wait_MapInfo (var tf: TNetFileTransfer; resList: TStringList): Integer;
+function g_Net_RequestResFileInfo (resIndex: LongInt; out tf: TNetFileTransfer): Integer;
+function g_Net_AbortResTransfer (var tf: TNetFileTransfer): Boolean;
+function g_Net_ReceiveResourceFile (resIndex: LongInt; var tf: TNetFileTransfer; strm: TStream): Integer;
+
+
implementation
uses
SysUtils,
e_input, g_nethandler, g_netmsg, g_netmaster, g_player, g_window, g_console,
- g_main, g_game, g_language, g_weapons, utils, ctypes;
+ g_main, g_game, g_language, g_weapons, utils, ctypes,
+ g_map;
+
+const
+ FILE_CHUNK_SIZE = 8192;
var
g_Net_DownloadTimeout: Single;
{ /// SERVICE FUNCTIONS /// }
+procedure clearNetClientTransfers (var nc: TNetClient);
+begin
+ nc.Transfer.stream.Free;
+ nc.Transfer.diskName := ''; // just in case
+ if (nc.Transfer.diskBuffer <> nil) then FreeMem(nc.Transfer.diskBuffer);
+ nc.Transfer.stream := nil;
+ nc.Transfer.diskBuffer := nil;
+end;
+
+
+procedure clearNetClient (var nc: TNetClient);
+begin
+ clearNetClientTransfers(nc);
+end;
+
+procedure clearNetClients (clearArray: Boolean);
+var
+ f: Integer;
+begin
+ for f := Low(NetClients) to High(NetClients) do clearNetClient(NetClients[f]);
+ if (clearArray) then SetLength(NetClients, 0);
+end;
function g_Net_FindSlot(): Integer;
NetClients[N].RCONAuth := False;
NetClients[N].Voted := False;
NetClients[N].Player := 0;
+ clearNetClientTransfers(NetClients[N]); // just in case
end;
Result := N;
NetOut.Clear();
NetBuf[NET_UNRELIABLE].Clear();
NetBuf[NET_RELIABLE].Clear();
- SetLength(NetClients, 0);
+ //SetLength(NetClients, 0);
+ clearNetClients(true); // clear array
NetPeer := nil;
NetHost := nil;
NetMyID := -1;
NetBuf[NET_UNRELIABLE].Clear();
NetBuf[NET_RELIABLE].Clear();
- SetLength(NetClients, 0);
+ //SetLength(NetClients, 0);
+ clearNetClients(true); // clear array
NetClientCount := 0;
NetPeer := nil;
NetClients[I].NetOut[NET_RELIABLE].Free();
end;
+ clearNetClients(false); // don't clear array
if (NetMPeer <> nil) and (NetMHost <> nil) then g_Net_Slist_Disconnect;
if NetPongSock <> ENET_SOCKET_NULL then
enet_socket_destroy(NetPongSock);
end;
end;
+
+const
+ // server packet type
+ NTF_SERVER_DONE = 10; // done with this file
+ NTF_SERVER_FILE_INFO = 11; // sent after client request
+ NTF_SERVER_CHUNK = 12; // next chunk; chunk number follows
+ NTF_SERVER_ABORT = 13; // server abort
+ NTF_SERVER_MAP_INFO = 14;
+
+ // client packet type
+ NTF_CLIENT_MAP_REQUEST = 100; // map file request; also, returns list of additional wads to download
+ NTF_CLIENT_FILE_REQUEST = 101; // resource file request (by index)
+ NTF_CLIENT_ABORT = 102; // do not send requested file, or abort current transfer
+ NTF_CLIENT_START = 103; // start transfer; client may resume download by sending non-zero starting chunk
+ NTF_CLIENT_ACK = 104; // chunk ack; chunk number follows
+
+
+procedure KillClientByFT (var nc: TNetClient);
+begin
+ e_LogWritefln('disconnected client #%d due to file transfer error', [nc.ID], TMsgType.Warning);
+ enet_peer_disconnect(nc.Peer, NET_DISC_FILE_TIMEOUT);
+ clearNetClientTransfers(nc);
+end;
+
+
+procedure ProcessHostFileTransfers (var nc: TNetClient);
+var
+ tf: ^TNetFileTransfer;
+ ct: Int64;
+ chunks: Integer;
+ rd: Integer;
+ pkt: PENetPacket;
+ omsg: TMsg;
+begin
+ tf := @nc.Transfer;
+ if (tf.stream = nil) then exit;;
+ ct := GetTimerMS();
+ // arbitrary timeout number
+ if (ct-tf.lastAckTime >= 5000) then
+ begin
+ KillClientByFT(nc);
+ exit;
+ end;
+ // check if we need to send something
+ if (not tf.inProgress) then exit; // waiting for the initial ack
+ // ok, we're sending chunks
+ if (tf.lastAckChunk <> tf.lastSentChunk) then exit;
+ Inc(tf.lastSentChunk);
+ // do it one chunk at a time; client ack will advance our chunk counter
+ chunks := (tf.size+tf.chunkSize-1) div tf.chunkSize;
+
+ if (tf.lastSentChunk > chunks) then
+ begin
+ KillClientByFT(nc);
+ exit;
+ end;
+
+ omsg.Alloc(NET_BUFSIZE);
+ try
+ omsg.Clear();
+ if (tf.lastSentChunk = chunks) then
+ begin
+ // we're done with this file
+ e_LogWritefln('download: client #%d, DONE sending chunks #%d/#%d', [nc.ID, tf.lastSentChunk, chunks]);
+ omsg.Write(Byte(NTF_SERVER_DONE));
+ clearNetClientTransfers(nc);
+ end
+ else
+ begin
+ // packet type
+ omsg.Write(Byte(NTF_SERVER_CHUNK));
+ omsg.Write(LongInt(tf.lastSentChunk));
+ // read chunk
+ rd := tf.size-(tf.lastSentChunk*tf.chunkSize);
+ if (rd > tf.chunkSize) then rd := tf.chunkSize;
+ omsg.Write(LongInt(rd));
+ e_LogWritefln('download: client #%d, sending chunk #%d/#%d (%d bytes)', [nc.ID, tf.lastSentChunk, chunks, rd]);
+ //FIXME: check for errors here
+ try
+ tf.stream.Seek(tf.lastSentChunk*tf.chunkSize, soFromBeginning);
+ tf.stream.ReadBuffer(tf.diskBuffer^, rd);
+ omsg.WriteData(tf.diskBuffer, rd);
+ except // sorry
+ KillClientByFT(nc);
+ exit;
+ end;
+ end;
+ // send packet
+ pkt := enet_packet_create(omsg.Data, omsg.CurSize, ENET_PACKET_FLAG_RELIABLE);
+ if not Assigned(pkt) then
+ begin
+ KillClientByFT(nc);
+ exit;
+ end;
+ if (enet_peer_send(nc.Peer, NET_CHAN_DOWNLOAD_EX, pkt) <> 0) then
+ begin
+ KillClientByFT(nc);
+ exit;
+ end;
+ finally
+ omsg.Free();
+ end;
+end;
+
+
+// received packet is in `NetEvent`
+procedure ProcessDownloadExPacket ();
+var
+ f: Integer;
+ nc: ^TNetClient;
+ nid: Integer = -1;
+ msg: TMsg;
+ omsg: TMsg;
+ cmd: Byte;
+ tf: ^TNetFileTransfer;
+ fname: string;
+ pkt: PENetPacket;
+ chunk: Integer;
+ ridx: Integer;
+ dfn: AnsiString;
+ md5: TMD5Digest;
+ st: TStream;
+ size: LongInt;
+begin
+ // find client index by peer
+ for f := Low(NetClients) to High(NetClients) do
+ begin
+ if (not NetClients[f].Used) then continue;
+ //if (NetClients[f].Transfer.stream = nil) then continue;
+ if (NetClients[f].Peer = NetEvent.peer) then
+ begin
+ nid := f;
+ break;
+ end;
+ end;
+ e_LogWritefln('RECEIVE: dlpacket; client=%d (datalen=%u)', [nid, NetEvent.packet^.dataLength]);
+
+ if (nid < 0) then exit; // wtf?!
+ nc := @NetClients[nid];
+
+ if (NetEvent.packet^.dataLength = 0) then
+ begin
+ KillClientByFT(nc^);
+ exit;
+ end;
+
+ tf := @NetClients[nid].Transfer;
+ tf.lastAckTime := GetTimerMS();
+
+ cmd := Byte(NetEvent.packet^.data^);
+ e_LogWritefln('RECEIVE: nid=%d; cmd=%u', [nid, cmd]);
+ case cmd of
+ NTF_CLIENT_FILE_REQUEST: // file request
+ begin
+ if (tf.stream <> nil) then
+ begin
+ KillClientByFT(nc^);
+ exit;
+ end;
+ if (NetEvent.packet^.dataLength < 2) then
+ begin
+ KillClientByFT(nc^);
+ exit;
+ end;
+ // new transfer request; build packet
+ if not msg.Init(NetEvent.packet^.data+1, NetEvent.packet^.dataLength-1, True) then
+ begin
+ KillClientByFT(nc^);
+ exit;
+ end;
+ // get resource index
+ ridx := msg.ReadLongInt();
+ if (ridx < -1) or (ridx >= gExternalResources.Count) then
+ begin
+ e_LogWritefln('Invalid resource index %d', [ridx], TMsgType.Warning);
+ KillClientByFT(nc^);
+ exit;
+ end;
+ if (ridx < 0) then fname := MapsDir+gGameSettings.WAD else fname := gExternalResources[ridx];
+ if (length(fname) = 0) then
+ begin
+ e_WriteLog('Invalid filename: '+fname, TMsgType.Warning);
+ KillClientByFT(nc^);
+ exit;
+ end;
+ tf.diskName := findDiskWad(fname);
+ if (length(tf.diskName) = 0) then tf.diskName := findDiskWad(GameDir+'/wads/'+fname);
+ if (length(tf.diskName) = 0) then
+ begin
+ e_LogWritefln('NETWORK: file "%s" not found!', [fname], TMsgType.Fatal);
+ KillClientByFT(nc^);
+ exit;
+ end;
+ // calculate hash
+ //TODO: cache hashes
+ tf.hash := MD5File(tf.diskName);
+ // create file stream
+ tf.diskName := findDiskWad(fname);
+ try
+ tf.stream := openDiskFileRO(tf.diskName);
+ except
+ tf.stream := nil;
+ end;
+ if (tf.stream = nil) then
+ begin
+ e_WriteLog(Format('NETWORK: file "%s" not found!', [fname]), TMsgType.Fatal);
+ KillClientByFT(nc^);
+ exit;
+ end;
+ e_LogWritefln('client #%d requested resource #%d (file is `%s` : `%s`)', [nc.ID, ridx, fname, tf.diskName]);
+ tf.size := tf.stream.size;
+ tf.chunkSize := FILE_CHUNK_SIZE; // arbitrary
+ tf.lastSentChunk := -1;
+ tf.lastAckChunk := -1;
+ tf.lastAckTime := GetTimerMS();
+ tf.inProgress := False; // waiting for the first ACK or for the cancel
+ GetMem(tf.diskBuffer, tf.chunkSize);
+ // sent file info message
+ omsg.Alloc(NET_BUFSIZE);
+ try
+ omsg.Clear();
+ omsg.Write(Byte(NTF_SERVER_FILE_INFO));
+ omsg.Write(tf.hash);
+ omsg.Write(tf.size);
+ omsg.Write(tf.chunkSize);
+ omsg.Write(ExtractFileName(fname));
+ pkt := enet_packet_create(omsg.Data, omsg.CurSize, ENET_PACKET_FLAG_RELIABLE);
+ if not Assigned(pkt) then
+ begin
+ KillClientByFT(nc^);
+ exit;
+ end;
+ if (enet_peer_send(nc.Peer, NET_CHAN_DOWNLOAD_EX, pkt) <> 0) then
+ begin
+ KillClientByFT(nc^);
+ exit;
+ end;
+ finally
+ omsg.Free();
+ end;
+ end;
+ NTF_CLIENT_ABORT: // do not send requested file, or abort current transfer
+ begin
+ e_LogWritefln('client #%d aborted file transfer', [nc.ID]);
+ clearNetClientTransfers(nc^);
+ end;
+ NTF_CLIENT_START: // start transfer; client may resume download by sending non-zero starting chunk
+ begin
+ if not Assigned(tf.stream) then
+ begin
+ KillClientByFT(nc^);
+ exit;
+ end;
+ if (tf.lastSentChunk <> -1) or (tf.lastAckChunk <> -1) or (tf.inProgress) then
+ begin
+ // double ack, get lost
+ KillClientByFT(nc^);
+ exit;
+ end;
+ if (NetEvent.packet^.dataLength < 2) then
+ begin
+ KillClientByFT(nc^);
+ exit;
+ end;
+ // build packet
+ if not msg.Init(NetEvent.packet^.data+1, NetEvent.packet^.dataLength-1, True) then
+ begin
+ KillClientByFT(nc^);
+ exit;
+ end;
+ chunk := msg.ReadLongInt();
+ if (chunk < 0) or (chunk > (tf.size+tf.chunkSize-1) div tf.chunkSize) then
+ begin
+ KillClientByFT(nc^);
+ exit;
+ end;
+ e_LogWritefln('client #%d started file transfer from chunk %d', [nc.ID, chunk]);
+ // start sending chunks
+ tf.inProgress := True;
+ tf.lastSentChunk := chunk-1;
+ tf.lastAckChunk := chunk-1;
+ end;
+ NTF_CLIENT_ACK: // chunk ack; chunk number follows
+ begin
+ if not Assigned(tf.stream) then
+ begin
+ KillClientByFT(nc^);
+ exit;
+ end;
+ if (tf.lastSentChunk < 0) or (not tf.inProgress) then
+ begin
+ // double ack, get lost
+ KillClientByFT(nc^);
+ exit;
+ end;
+ if (NetEvent.packet^.dataLength < 2) then
+ begin
+ KillClientByFT(nc^);
+ exit;
+ end;
+ // build packet
+ if not msg.Init(NetEvent.packet^.data+1, NetEvent.packet^.dataLength-1, True) then
+ begin
+ KillClientByFT(nc^);
+ exit;
+ end;
+ chunk := msg.ReadLongInt();
+ if (chunk < 0) or (chunk > (tf.size+tf.chunkSize-1) div tf.chunkSize) then
+ begin
+ KillClientByFT(nc^);
+ exit;
+ end;
+ // do it this way, so client may seek, or request retransfers for some reason
+ tf.lastAckChunk := chunk;
+ tf.lastSentChunk := chunk;
+ e_LogWritefln('client #%d acked file transfer chunk %d', [nc.ID, chunk]);
+ end;
+ NTF_CLIENT_MAP_REQUEST:
+ begin
+ e_LogWritefln('client #%d requested map info', [nc.ID]);
+ omsg.Alloc(NET_BUFSIZE);
+ try
+ omsg.Clear();
+ dfn := findDiskWad(MapsDir+gGameSettings.WAD);
+ if (dfn = '') then dfn := '!wad_not_found!.wad'; //FIXME
+ md5 := MD5File(dfn);
+ st := openDiskFileRO(dfn);
+ if not assigned(st) then exit; //wtf?!
+ size := st.size;
+ st.Free;
+ // packet type
+ omsg.Write(Byte(NTF_SERVER_MAP_INFO));
+ // map wad name
+ omsg.Write(gGameSettings.WAD);
+ // map wad md5
+ omsg.Write(md5);
+ // map wad size
+ omsg.Write(size);
+ // number of external resources for map
+ omsg.Write(LongInt(gExternalResources.Count));
+ // external resource names
+ for f := 0 to gExternalResources.Count-1 do
+ begin
+ omsg.Write(ExtractFileName(gExternalResources[f])); // GameDir+'/wads/'+ResList.Strings[i]
+ end;
+ // send packet
+ pkt := enet_packet_create(omsg.Data, omsg.CurSize, ENET_PACKET_FLAG_RELIABLE);
+ if not Assigned(pkt) then exit;
+ if (enet_peer_send(nc.Peer, NET_CHAN_DOWNLOAD_EX, pkt) <> 0) then exit;
+ finally
+ omsg.Free();
+ end;
+ end;
+ else
+ begin
+ KillClientByFT(NetClients[nid]);
+ exit;
+ end;
+ end;
+end;
+
+
function g_Net_Host_Update(): enet_size_t;
var
IP: string;
ID: Integer;
TC: pTNetClient;
TP: TPlayer;
+ f: Integer;
begin
IP := '';
Result := 0;
- if NetUseMaster then
- g_Net_Slist_Check;
+ if NetUseMaster then g_Net_Slist_Check;
g_Net_Host_CheckPings;
+ // process file transfers
+ for f := Low(NetClients) to High(NetClients) do
+ begin
+ if (not NetClients[f].Used) then continue;
+ if (NetClients[f].Transfer.stream = nil) then continue;
+ ProcessHostFileTransfers(NetClients[f]);
+ end;
+
while (enet_host_service(NetHost, @NetEvent, 0) > 0) do
begin
case (NetEvent.kind) of
NetClients[ID].RCONAuth := False;
NetClients[ID].NetOut[NET_UNRELIABLE].Alloc(NET_BUFSIZE*2);
NetClients[ID].NetOut[NET_RELIABLE].Alloc(NET_BUFSIZE*2);
+ clearNetClientTransfers(NetClients[ID]); // just in case
enet_peer_timeout(NetEvent.peer, ENET_PEER_TIMEOUT_LIMIT * 2, ENET_PEER_TIMEOUT_MINIMUM * 2, ENET_PEER_TIMEOUT_MAXIMUM * 2);
ENET_EVENT_TYPE_RECEIVE:
begin
- ID := Byte(NetEvent.peer^.data^);
- if ID > High(NetClients) then Exit;
- TC := @NetClients[ID];
+ //e_LogWritefln('RECEIVE: chan=%u', [NetEvent.channelID]);
+ if (NetEvent.channelID = NET_CHAN_DOWNLOAD_EX) then
+ begin
+ ProcessDownloadExPacket();
+ end
+ else
+ begin
+ ID := Byte(NetEvent.peer^.data^);
+ if ID > High(NetClients) then Exit;
+ TC := @NetClients[ID];
- if NetDump then g_Net_DumpRecvBuffer(NetEvent.packet^.data, NetEvent.packet^.dataLength);
- g_Net_Host_HandlePacket(TC, NetEvent.packet, g_Net_HostMsgHandler);
+ if NetDump then g_Net_DumpRecvBuffer(NetEvent.packet^.data, NetEvent.packet^.dataLength);
+ g_Net_Host_HandlePacket(TC, NetEvent.packet, g_Net_HostMsgHandler);
+ end;
end;
ENET_EVENT_TYPE_DISCONNECT:
begin
ID := Byte(NetEvent.peer^.data^);
if ID > High(NetClients) then Exit;
+ clearNetClient(NetClients[ID]);
TC := @NetClients[ID];
if TC = nil then Exit;
enet_host_flush(NetHost);
end;
-function UserRequestExit: Boolean;
+function g_Net_UserRequestExit: Boolean;
begin
Result := e_KeyPressed(IK_SPACE) or
e_KeyPressed(IK_ESCAPE) or
e_KeyPressed(JOY3_JUMP)
end;
+{
function g_Net_Wait_Event(msgId: Word): TMemoryStream;
var
ev: ENetEvent;
status := 0 (* error: timeout *)
end;
ProcessLoading(true);
- until (status <> 2) or UserRequestExit();
+ until (status <> 2) or g_Net_UserRequestExit();
Result := stream
end;
+}
+
+
+function getNewTimeoutEnd (): Int64;
+begin
+ result := GetTimerMS();
+ if (g_Net_DownloadTimeout <= 0) then
+ begin
+ result := result+1000*60*3; // 3 minutes
+ end
+ else
+ begin
+ result := result+trunc(g_Net_DownloadTimeout*1000);
+ end;
+end;
+
+
+function g_Net_SendMapRequest (): Boolean;
+var
+ msg: TMsg;
+ pkt: PENetPacket;
+begin
+ result := false;
+ e_LogWritefln('sending map request...', []);
+ // send request
+ msg.Alloc(NET_BUFSIZE);
+ try
+ msg.Clear();
+ msg.Write(Byte(NTF_CLIENT_MAP_REQUEST));
+ e_LogWritefln(' request size is %d', [msg.CurSize]);
+ pkt := enet_packet_create(msg.Data, msg.CurSize, ENET_PACKET_FLAG_RELIABLE);
+ if not Assigned(pkt) then exit;
+ if (enet_peer_send(NetPeer, NET_CHAN_DOWNLOAD_EX, pkt) <> 0) then exit;
+ enet_host_flush(NetHost);
+ finally
+ msg.Free();
+ end;
+ result := true;
+end;
+
+
+// returns `false` on error or user abort
+// fills:
+// hash
+// size
+// chunkSize
+// returns:
+// <0 on error
+// 0 on success
+// 1 on user abort
+// 2 on server abort
+// for maps, first `tf.diskName` name will be map wad name, and `tf.hash`/`tf.size` will contain map info
+function g_Net_Wait_MapInfo (var tf: TNetFileTransfer; resList: TStringList): Integer;
+var
+ ev: ENetEvent;
+ rMsgId: Byte;
+ Ptr: Pointer;
+ msg: TMsg;
+ freePacket: Boolean = false;
+ ct, ett: Int64;
+ status: cint;
+ s: AnsiString;
+ rc, f: LongInt;
+begin
+ FillChar(ev, SizeOf(ev), 0);
+ Result := -1;
+ try
+ ett := getNewTimeoutEnd();
+ repeat
+ status := enet_host_service(NetHost, @ev, 300);
+ if (status < 0) then
+ begin
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' network error', True);
+ Result := -1;
+ exit;
+ end;
+ if (status = 0) then
+ begin
+ // check for timeout
+ ct := GetTimerMS();
+ if (ct >= ett) then
+ begin
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' timeout reached', True);
+ Result := -1;
+ exit;
+ end;
+ end
+ else
+ begin
+ // some event
+ case ev.kind of
+ ENET_EVENT_TYPE_RECEIVE:
+ begin
+ freePacket := true;
+ if (ev.channelID <> NET_CHAN_DOWNLOAD_EX) then
+ begin
+ //e_LogWritefln('g_Net_Wait_MapInfo: skip message from non-transfer channel', []);
+ end
+ else
+ begin
+ ett := getNewTimeoutEnd();
+ if (ev.packet.dataLength < 1) then
+ begin
+ e_LogWritefln('g_Net_Wait_MapInfo: invalid server packet (no data)', []);
+ Result := -1;
+ exit;
+ end;
+ Ptr := ev.packet^.data;
+ rMsgId := Byte(Ptr^);
+ e_LogWritefln('g_Net_Wait_MapInfo: got message %u from server (dataLength=%u)', [rMsgId, ev.packet^.dataLength]);
+ if (rMsgId = NTF_SERVER_FILE_INFO) then
+ begin
+ e_LogWritefln('g_Net_Wait_MapInfo: waiting for map info reply, but got file info reply', []);
+ Result := -1;
+ exit;
+ end
+ else if (rMsgId = NTF_SERVER_ABORT) then
+ begin
+ e_LogWritefln('g_Net_Wait_MapInfo: server aborted transfer', []);
+ Result := 2;
+ exit;
+ end
+ else if (rMsgId = NTF_SERVER_MAP_INFO) then
+ begin
+ e_LogWritefln('g_Net_Wait_MapInfo: creating map info packet...', []);
+ if not msg.Init(ev.packet^.data+1, ev.packet^.dataLength-1, True) then exit;
+ e_LogWritefln('g_Net_Wait_MapInfo: parsing map info packet (rd=%d; max=%d)...', [msg.ReadCount, msg.MaxSize]);
+ resList.Clear();
+ // map wad name
+ tf.diskName := msg.ReadString();
+ e_LogWritefln('g_Net_Wait_MapInfo: map wad is `%s`', [tf.diskName]);
+ // map wad md5
+ tf.hash := msg.ReadMD5();
+ // map wad size
+ tf.size := msg.ReadLongInt();
+ e_LogWritefln('g_Net_Wait_MapInfo: map wad size is %d', [tf.size]);
+ // number of external resources for map
+ rc := msg.ReadLongInt();
+ if (rc < 0) or (rc > 1024) then
+ begin
+ e_LogWritefln('g_Net_Wait_Event: invalid number of map external resources (%d)', [rc]);
+ Result := -1;
+ exit;
+ end;
+ e_LogWritefln('g_Net_Wait_MapInfo: map external resource count is %d', [rc]);
+ // external resource names
+ for f := 0 to rc-1 do
+ begin
+ s := ExtractFileName(msg.ReadString());
+ if (length(s) = 0) then
+ begin
+ Result := -1;
+ exit;
+ end;
+ resList.append(s);
+ end;
+ e_LogWritefln('g_Net_Wait_MapInfo: got map info', []);
+ Result := 0; // success
+ exit;
+ end
+ else
+ begin
+ e_LogWritefln('g_Net_Wait_Event: invalid server packet type', []);
+ Result := -1;
+ exit;
+ end;
+ end;
+ end;
+ ENET_EVENT_TYPE_DISCONNECT:
+ begin
+ if (ev.data <= NET_DISC_MAX) then
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' ' + _lc[TStrings_Locale(Cardinal(I_NET_DISC_NONE) + ev.data)], True);
+ Result := -1;
+ exit;
+ end;
+ else
+ begin
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' unknown ENet event ' + IntToStr(Ord(ev.kind)), True);
+ result := -1;
+ exit;
+ end;
+ end;
+ if (freePacket) then begin freePacket := false; enet_packet_destroy(ev.packet); end;
+ end;
+ ProcessLoading(true);
+ if g_Net_UserRequestExit() then
+ begin
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' user abort', True);
+ Result := 1;
+ exit;
+ end;
+ until false;
+ finally
+ if (freePacket) then enet_packet_destroy(ev.packet);
+ end;
+end;
+
+
+// returns `false` on error or user abort
+// fills:
+// diskName (actually, base name)
+// hash
+// size
+// chunkSize
+// returns:
+// <0 on error
+// 0 on success
+// 1 on user abort
+// 2 on server abort
+// for maps, first `tf.diskName` name will be map wad name, and `tf.hash`/`tf.size` will contain map info
+function g_Net_RequestResFileInfo (resIndex: LongInt; out tf: TNetFileTransfer): Integer;
+var
+ ev: ENetEvent;
+ rMsgId: Byte;
+ Ptr: Pointer;
+ msg: TMsg;
+ freePacket: Boolean = false;
+ ct, ett: Int64;
+ status: cint;
+ pkt: PENetPacket;
+begin
+ // send request
+ msg.Alloc(NET_BUFSIZE);
+ try
+ msg.Clear();
+ msg.Write(Byte(NTF_CLIENT_FILE_REQUEST));
+ msg.Write(resIndex);
+ pkt := enet_packet_create(msg.Data, msg.CurSize, ENET_PACKET_FLAG_RELIABLE);
+ if not Assigned(pkt) then
+ begin
+ result := -1;
+ exit;
+ end;
+ if (enet_peer_send(NetPeer, NET_CHAN_DOWNLOAD_EX, pkt) <> 0) then
+ begin
+ result := -1;
+ exit;
+ end;
+ finally
+ msg.Free();
+ end;
+
+ FillChar(ev, SizeOf(ev), 0);
+ Result := -1;
+ try
+ ett := getNewTimeoutEnd();
+ repeat
+ status := enet_host_service(NetHost, @ev, 300);
+ if (status < 0) then
+ begin
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' network error', True);
+ Result := -1;
+ exit;
+ end;
+ if (status = 0) then
+ begin
+ // check for timeout
+ ct := GetTimerMS();
+ if (ct >= ett) then
+ begin
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' timeout reached', True);
+ Result := -1;
+ exit;
+ end;
+ end
+ else
+ begin
+ // some event
+ case ev.kind of
+ ENET_EVENT_TYPE_RECEIVE:
+ begin
+ freePacket := true;
+ if (ev.channelID <> NET_CHAN_DOWNLOAD_EX) then
+ begin
+ //e_LogWriteln('g_Net_Wait_Event: skip message from non-transfer channel');
+ end
+ else
+ begin
+ ett := getNewTimeoutEnd();
+ if (ev.packet.dataLength < 1) then
+ begin
+ e_LogWriteln('g_Net_Wait_Event: invalid server packet (no data)');
+ Result := -1;
+ exit;
+ end;
+ Ptr := ev.packet^.data;
+ rMsgId := Byte(Ptr^);
+ e_LogWritefln('received transfer packet with id %d (%u bytes)', [rMsgId, ev.packet^.dataLength]);
+ if (rMsgId = NTF_SERVER_FILE_INFO) then
+ begin
+ if not msg.Init(ev.packet^.data+1, ev.packet^.dataLength-1, True) then exit;
+ tf.hash := msg.ReadMD5();
+ tf.size := msg.ReadLongInt();
+ tf.chunkSize := msg.ReadLongInt();
+ tf.diskName := ExtractFileName(msg.readString());
+ if (tf.size < 0) or (tf.chunkSize <> FILE_CHUNK_SIZE) or (length(tf.diskName) = 0) then
+ begin
+ e_LogWritefln('g_Net_RequestResFileInfo: invalid file info packet', []);
+ Result := -1;
+ exit;
+ end;
+ e_LogWritefln('got file info for resource #%d: size=%d; name=%s', [resIndex, tf.size, tf.diskName]);
+ Result := 0; // success
+ exit;
+ end
+ else if (rMsgId = NTF_SERVER_ABORT) then
+ begin
+ e_LogWriteln('g_Net_RequestResFileInfo: server aborted transfer');
+ Result := 2;
+ exit;
+ end
+ else if (rMsgId = NTF_SERVER_MAP_INFO) then
+ begin
+ e_LogWriteln('g_Net_RequestResFileInfo: waiting for map info reply, but got file info reply');
+ Result := -1;
+ exit;
+ end
+ else
+ begin
+ e_LogWriteln('g_Net_RequestResFileInfo: invalid server packet type');
+ Result := -1;
+ exit;
+ end;
+ end;
+ end;
+ ENET_EVENT_TYPE_DISCONNECT:
+ begin
+ if (ev.data <= NET_DISC_MAX) then
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' ' + _lc[TStrings_Locale(Cardinal(I_NET_DISC_NONE) + ev.data)], True);
+ Result := -1;
+ exit;
+ end;
+ else
+ begin
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' unknown ENet event ' + IntToStr(Ord(ev.kind)), True);
+ result := -1;
+ exit;
+ end;
+ end;
+ if (freePacket) then begin freePacket := false; enet_packet_destroy(ev.packet); end;
+ end;
+ ProcessLoading(true);
+ if g_Net_UserRequestExit() then
+ begin
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' user abort', True);
+ Result := 1;
+ exit;
+ end;
+ until false;
+ finally
+ if (freePacket) then enet_packet_destroy(ev.packet);
+ end;
+end;
+
+
+function g_Net_AbortResTransfer (var tf: TNetFileTransfer): Boolean;
+var
+ msg: TMsg;
+ pkt: PENetPacket;
+begin
+ result := false;
+ e_LogWritefln('aborting file transfer...', []);
+ // send request
+ msg.Alloc(NET_BUFSIZE);
+ try
+ msg.Clear();
+ msg.Write(Byte(NTF_CLIENT_ABORT));
+ pkt := enet_packet_create(msg.Data, msg.CurSize, ENET_PACKET_FLAG_RELIABLE);
+ if not Assigned(pkt) then exit;
+ if (enet_peer_send(NetPeer, NET_CHAN_DOWNLOAD_EX, pkt) <> 0) then exit;
+ enet_host_flush(NetHost);
+ finally
+ msg.Free();
+ end;
+ result := true;
+end;
+
+
+// returns `false` on error or user abort
+// fills:
+// hash
+// size
+// chunkSize
+// returns:
+// <0 on error
+// 0 on success
+// 1 on user abort
+// 2 on server abort
+// for maps, first `tf.diskName` name will be map wad name, and `tf.hash`/`tf.size` will contain map info
+function g_Net_ReceiveResourceFile (resIndex: LongInt; var tf: TNetFileTransfer; strm: TStream): Integer;
+var
+ ev: ENetEvent;
+ rMsgId: Byte;
+ Ptr: Pointer;
+ msg: TMsg;
+ omsg: TMsg;
+ freePacket: Boolean = false;
+ ct, ett: Int64;
+ status: cint;
+ nextChunk: Integer = 0;
+ chunk: Integer;
+ csize: Integer;
+ buf: PChar = nil;
+ pkt: PENetPacket;
+begin
+ // send request
+ msg.Alloc(NET_BUFSIZE);
+ try
+ msg.Clear();
+ msg.Write(Byte(NTF_CLIENT_START));
+ msg.Write(LongInt(0));
+ pkt := enet_packet_create(msg.Data, msg.CurSize, ENET_PACKET_FLAG_RELIABLE);
+ if not Assigned(pkt) then exit;
+ if (enet_peer_send(NetPeer, NET_CHAN_DOWNLOAD_EX, pkt) <> 0) then exit;
+ finally
+ msg.Free();
+ end;
+
+ // wait for reply data
+ FillChar(ev, SizeOf(ev), 0);
+ Result := -1;
+ GetMem(buf, tf.chunkSize);
+ try
+ ett := getNewTimeoutEnd();
+ repeat
+ status := enet_host_service(NetHost, @ev, 300);
+ if (status < 0) then
+ begin
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' network error', True);
+ Result := -1;
+ exit;
+ end;
+ if (status = 0) then
+ begin
+ // check for timeout
+ ct := GetTimerMS();
+ if (ct >= ett) then
+ begin
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' timeout reached', True);
+ Result := -1;
+ exit;
+ end;
+ end
+ else
+ begin
+ // some event
+ case ev.kind of
+ ENET_EVENT_TYPE_RECEIVE:
+ begin
+ freePacket := true;
+ if (ev.channelID <> NET_CHAN_DOWNLOAD_EX) then
+ begin
+ //e_LogWritefln('g_Net_Wait_Event: skip message from non-transfer channel', []);
+ end
+ else
+ begin
+ ett := getNewTimeoutEnd();
+ if (ev.packet.dataLength < 1) then
+ begin
+ e_LogWritefln('g_Net_ReceiveResourceFile: invalid server packet (no data)', []);
+ Result := -1;
+ exit;
+ end;
+ Ptr := ev.packet^.data;
+ rMsgId := Byte(Ptr^);
+ if (rMsgId = NTF_SERVER_DONE) then
+ begin
+ e_LogWritefln('file transfer complete.', []);
+ result := 0;
+ exit;
+ end
+ else if (rMsgId = NTF_SERVER_CHUNK) then
+ begin
+ if not msg.Init(ev.packet^.data+1, ev.packet^.dataLength-1, True) then exit;
+ chunk := msg.ReadLongInt();
+ csize := msg.ReadLongInt();
+ if (chunk <> nextChunk) then
+ begin
+ e_LogWritefln('received chunk %d, but expected chunk %d', [chunk, nextChunk]);
+ Result := -1;
+ exit;
+ end;
+ if (csize < 0) or (csize > tf.chunkSize) then
+ begin
+ e_LogWritefln('received chunk with size %d, but expected chunk size is %d', [csize, tf.chunkSize]);
+ Result := -1;
+ exit;
+ end;
+ e_LogWritefln('got chunk #%d of #%d (csize=%d)', [chunk, (tf.size+tf.chunkSize-1) div tf.chunkSize, csize]);
+ msg.ReadData(buf, csize);
+ strm.WriteBuffer(buf^, csize);
+ nextChunk := chunk+1;
+ // send ack
+ omsg.Alloc(NET_BUFSIZE);
+ try
+ omsg.Clear();
+ omsg.Write(Byte(NTF_CLIENT_ACK));
+ omsg.Write(LongInt(chunk));
+ pkt := enet_packet_create(omsg.Data, omsg.CurSize, ENET_PACKET_FLAG_RELIABLE);
+ if not Assigned(pkt) then exit;
+ if (enet_peer_send(NetPeer, NET_CHAN_DOWNLOAD_EX, pkt) <> 0) then exit;
+ finally
+ omsg.Free();
+ end;
+ end
+ else if (rMsgId = NTF_SERVER_ABORT) then
+ begin
+ e_LogWritefln('g_Net_ReceiveResourceFile: server aborted transfer', []);
+ Result := 2;
+ exit;
+ end
+ else
+ begin
+ e_LogWritefln('g_Net_ReceiveResourceFile: invalid server packet type', []);
+ Result := -1;
+ exit;
+ end;
+ end;
+ end;
+ ENET_EVENT_TYPE_DISCONNECT:
+ begin
+ if (ev.data <= NET_DISC_MAX) then
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' ' + _lc[TStrings_Locale(Cardinal(I_NET_DISC_NONE) + ev.data)], True);
+ Result := -1;
+ exit;
+ end;
+ else
+ begin
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' unknown ENet event ' + IntToStr(Ord(ev.kind)), True);
+ result := -1;
+ exit;
+ end;
+ end;
+ if (freePacket) then begin freePacket := false; enet_packet_destroy(ev.packet); end;
+ end;
+ ProcessLoading(true);
+ if g_Net_UserRequestExit() then
+ begin
+ g_Console_Add(_lc[I_NET_MSG_ERROR] + _lc[I_NET_ERR_CONN] + ' user abort', True);
+ Result := 1;
+ exit;
+ end;
+ until false;
+ finally
+ FreeMem(buf);
+ if (freePacket) then enet_packet_destroy(ev.packet);
+ end;
+end;
+
function g_Net_IsHostBanned(IP: LongWord; Perm: Boolean = False): Boolean;
var
initialization
conRegVar('cl_downloadtimeout', @g_Net_DownloadTimeout, 0.0, 1000000.0, '', 'timeout in seconds, 0 to disable it');
+ SetLength(NetClients, 0);
g_Net_DownloadTimeout := 60;
NetIn.Alloc(NET_BUFSIZE);
NetOut.Alloc(NET_BUFSIZE);