unit GamePacket;

interface

uses
    Windows, Sysutils, Classes, Winsock2;
    
procedure MyRecvData(buf: Pchar; len: integer);
procedure MySendData(buf: Pchar; len: integer);
procedure GamePacketSend(buf: Pchar; len: integer);
procedure GamePacketRecv(buf: Pchar; len: integer);
procedure SendMsg(source: Pchar; size: integer);
function  SaveLog(LogStr: String):bool;

var
    SendNum : integer = 0;
    RecvNum : integer = 0;
    GameSocket : Tsocket;  //定義socket
    
implementation

uses DllForm, GameCode, hook;

procedure MyRecvData(buf: Pchar; len: integer);
var
    i, onelen : integer;
    PacketH : Pchar;
begin
i := 0;
onelen := 0;
PacketH := buf;
while i < len do
begin
    if buf[i] = '(' then
    begin
        onelen := 1;
        PacketH := @buf[i];
    end;
    if buf[i] = ')' then
    begin
        GamePacketRecv(PacketH, onelen);
    end;
                
    inc(onelen);
    inc(i);
end;
end;

procedure MySendData(buf: Pchar; len: integer);
var
    i,onelen : integer;
    PacketH : Pchar;
begin
i := 0;
onelen := 0;
PacketH := buf;
while i < len do
begin
    if buf[i] = '(' then
    begin
        onelen := 1;
        PacketH := @buf[i] ;
    end;
    if buf[i] = ')' then
    begin
        GamePacketSend(PacketH, onelen);      
    end;
                
    inc(onelen);
    inc(i);
end;
end;

procedure GamePacketSend(buf: Pchar; len: integer);
var
    OutLen  : integer;
    OutChar, RecvBuf : array [0..3000] of char;
    LogStr  : string;
begin
CopyMemory(@RecvBuf[0], @buf[0], len);
OutLen := Decode(@RecvBuf[1], len-1, @OutChar);

if Dllform1.Checksend.Checked = false then exit;
with DllForm1.Listsend.Items.Add do                   //填加記錄到表
begin
    Caption := IntToStr(SendNum);
    inc(SendNum);
    SubItems.add(CharToAscii(@OutChar[0], 2));          //封包長度
    SubItems.add(CharToAscii(@OutChar[2], 2));          //封包代號
    SubItems.add(CharToAscii(@OutChar[4], 4));          //0000 0000
    SubItems.add(CharToAscii(@OutChar[8], 2));          //標識符后數(shù)據(jù)長度
    SubItems.add(CharToAscii(@OutChar[10], 1));         //標識符
    SubItems.add(CharToAscii(@OutChar[11], OutLen-11)); //參數(shù)
    SubItems.add(Pchar(@OutChar[11]));                  //參數(shù)
end;

if DllForm1.CheckSave.Checked = true then       //保存到文件
begin
    LogStr := 'send'+' '+IntToStr(sendnum)+' '+ CharToAscii(@OutChar[10], 1)
            +' '+CharToAscii (@OutChar[11],outlen-11)+' '+Pchar(@OutChar[11]);
    SaveLog(logstr);
end;
end;

procedure gamePacketrecv (buf:Pchar; len:integer);
var
    outlen  : integer;
    OutChar, RecvBuf : array [0..3000] of char;
    logstr  : string;
begin
CopyMemory(@RecvBuf[0], @buf, len);
outlen := Decode(@RecvBuf[1], len-1, @OutChar);

if DllForm1.Checkrecv.Checked = false then exit;
with DllForm1.Listrecv.Items.Add do
begin
    caption := IntToStr(RecvNum);
    inc(RecvNum);
    SubItems.add(CharToAscii(@OutChar[0], 2));                  //封包長度
    SubItems.add(CharToAscii(@OutChar[2], 2));                  //封包代號
    SubItems.add(CharToAscii(@OutChar[4], 4));                  //0000 0000
    SubItems.add(CharToAscii(@OutChar[8], 2));                  //標識符后數(shù)據(jù)長度
    SubItems.add(CharToAscii(@OutChar[10], 1));                 //標識符
    SubItems.add(CharToAscii(@OutChar[11], outlen-11));         //參數(shù)
    SubItems.add(Pchar(@OutChar[11]));                          //參數(shù)
end;

if DllForm1.CheckSave.Checked = true then
begin
    logstr := 'recv' + ' ' + IntToStr(RecvNum)+ ' '+ CharToAscii(@OutChar[10], 1)
            + ' '+CharToAscii(@OutChar[11], outlen-11)+' '+Pchar(@OutChar[11]);
    SaveLog(logstr);
end;
end;         

procedure SendMsg(source: Pchar; size: integer);     //加密并調(diào)用發(fā)送封包
var
  len : integer;
  OutChar, SendBuf : array [0..1000] of char;
begin
len := Encode(source, size, @OutChar[1]);
CopyMemory(@sendbuf[0], @OutChar[0], len + 1);
SendBuf[0] := '(';
SendBuf[len + 1] := ')';
if GameSocket <> 0 then
    mysend(GameSocket, sendbuf, len + 2, 0);
end;

function SaveLog(LogStr: String):bool;                //log記錄
var
    logFile : TextFile;
begin
AssignFile(logFile, DllForm1.Edit1.text);
if FileExists(DllForm1.Edit1.text) = false then ReWrite(logFile)
else
    Append(logFile);
    Writeln(logFile, LogStr);
    CloseFile(logFile);
    result := true;
end;

end.