int __thiscall sub_6544DF(void *this, int a2, int a3, int a4, signed int a5)
{
  signed int v5; // edi@1
  void *v6; // ebx@1
  signed int v7; // eax@3
  int result; // eax@4
  int v9; // eax@6
  int v10; // eax@7
  int v11; // esi@8
  int v12; // eax@9
  int v13; // ecx@13
  signed int v14; // [sp-4h] [bp-12Ch]@19
  char v15; // [sp+10h] [bp-118h]@8
  void *v16; // [sp+10Ch] [bp-1Ch]@1
  int v17; // [sp+110h] [bp-18h]@17
  int v18; // [sp+114h] [bp-14h]@8
  int v19; // [sp+118h] [bp-10h]@8
  int v20; // [sp+11Ch] [bp-Ch]@8
  int v21; // [sp+120h] [bp-8h]@8
  int v22; // [sp+124h] [bp-4h]@8
  int v23; // [sp+13Ch] [bp+14h]@9

  v5 = a5;
  v6 = this;
  v16 = this;
  if ( a5 < 4 || !a4 || (v7 = sub_653147(a2), v7 >= 4) )
    goto LABEL_4;
  v9 = (int)((char *)v6 + v7 + 1650);
  if ( *(_BYTE *)v9 )
  {
    v12 = *(_DWORD *)a4;
    v23 = *(_DWORD *)a4;
    if ( *(_DWORD *)a4 == 1882 )
    {
      v14 = 0;
    }
    else
    {
      if ( *(_DWORD *)a4 == 1994 )
        return sub_654757(a2, a4 + 4, v5 - 4);
      if ( *(_DWORD *)a4 != 5962 )
      {
        if ( *(_DWORD *)a4 == 6105 )
        {
          result = sub_653246(a2, a3, a4 + 4, v5 - 4);
        }
        else
        {
          v13 = ((_WORD)v12 - 1) & 0xF6E;
          if ( v13 == 1864 || v13 == 1896 )
          {
            v19 = 0;
            v20 = -1;
            v22 = 0;
            v17 = (int)off_D61170;
            v18 = a4 + 4;
            v21 = v5 - 4;
            sub_CB2DD2(a2, a3, v12, &v17);
            v17 = (int)off_D61170;
            result = sub_4069CE(&v17);
          }
          else
          {
            result = sub_653D73(a2);
            if ( (_BYTE)result )
              result = sub_624E00(v23, v6, a2, a4, v5);
          }
        }
        return result;
      }
      v14 = 1;
    }
    return sub_6531E2(a2, a4 + 4, v5 - 4, v14);
  }
  *(_BYTE *)v9 = 1;
  v10 = sub_A3D160("WORLD OF WARCRAFT CONNECTION - SERVER TO CLIENT");
  if ( sub_A3D9B2(a4, "WORLD OF WARCRAFT CONNECTION - SERVER TO CLIENT", v10) )
  {
LABEL_4:
    sub_653B4C(a2, 3);
    return sub_9577B0(a2);
  }
  v11 = sub_A3D160("WORLD OF WARCRAFT CONNECTION - CLIENT TO SERVER") + 1;
  sub_A3D560(&v15, "WORLD OF WARCRAFT CONNECTION - CLIENT TO SERVER", v11);
  v18 = (int)&v15;
  v19 = 0;
  v20 = v11;
  v21 = 4;
  v22 = 0;
  sub_9574FE(&v18, 1);
  return sub_53A7AF(
           v19,
           "d:\\buildserver\\wow\\5\\work\\wow-code\\branches\\wow-patch-6_0_3-branch-fastpatch-1\\wow\\source\\wowservices\\PacketPipe.h",
           34,
           0);
}