Send packet back

[wongerlt]

Hello all,
Im all do like in this thread http://coderx.ru/showthread.php?t=11604
all work fine, i get packets from server, but how send it back?
example here:
int __fastcall new_AddNetworkQueue(unsigned int This, unsigned int EDX, TNetworkPacket *NetworkPacket)
{
if (NetworkPacket->subid == 0xFFFF)
{
switch (NetworkPacket->id)
{
case 0x2E:
decodeKey(NetworkPacket->data + 1);
break;
case 0x74:
// reply ?
Logger("Get from server.");
break;
default:
Logger("Get from server other");
break;
}
}

return true_AddNetworkQueue(This, EDX, NetworkPacket);
}
i want reply to 0x74 packet, how to do it?
Thanks. :)

[Yegor]

Which chronicles the client?

[Smwr]

Try do it like it implemented in UNetworkHandler::RequestXXX (see your engine.dll for details)


void(__cdecl *_sendPacket)(void *self, char *format, ...) = NULL;
void *_clientSocket = NULL;

int __fastcall AddNetworkQueueHook(NetworkHandler* self, int, NetworkPacket *packet) {

if (SendPacket == NULL) {
__asm {
mov ebx, ecx
mov ecx, [ebx + 0x48] ; see offset in disassembler
mov edx, [ecx]
mov _clientSocket, ecx
mov ecx, [edx + 0x6C]; in disassembler too
mov _sendPacket, ecx;
}
}

//do smth

return result;
}



and use it e.g. _sendPacket(_clientSocket, "cddc", 0x39, 0xE2, 0, 0);

[wongerlt]

Its interlude.
Thanks i will try this and reply result :)

Добавлено через 10 минут
it seems im still to noob for it

[Smwr]

for interlude will 0x68 instead 0x6C.
this should work

[wongerlt]

Yes, i use 68.
I receive packets and etc, but now i want send packet to server from this place:

int __fastcall new_AddNetworkQueue(unsigned int This, unsigned int EDX, TNetworkPacket *NetworkPacket)
{
if ((*(unsigned int*) (KiUserExceptDispADR + 10) + KiUserExceptDispADR < hNtDllStart) || (*(unsigned int*) (KiUserExceptDispADR + 10) + KiUserExceptDispADR > hNtDllEnd))
ErrorExit("Bot Program Detected #0!");

unsigned int retAddr = *((unsigned int*) &NetworkPacket - 1);

if ((retAddr < hEngineStart) || (retAddr > hEngineEnd))
ErrorExit("Bot Program Detected #1!");

if (NetworkPacket->subid == 0xFFFF)
{
switch (NetworkPacket->id)
{
case 0x2E:
decodeKey(NetworkPacket->data + 1);
break;
case 0x74:
// this place send packet..?
break;
}
}

return true_AddNetworkQueue(This, EDX, NetworkPacket);
}
i want send packet with type 0x68.
what function to use?

[Smwr]

void(__cdecl *_sendPacket)(void *self, char *format, ...) = NULL;
void *_clientSocket = NULL;

int __fastcall new_AddNetworkQueue(unsigned int This, unsigned int EDX, TNetworkPacket *NetworkPacket)
{

if (SendPacket == NULL) {
__asm {
mov ebx, ecx
mov ecx, [ebx + 0x48] ; see offset in disassembler
mov edx, [ecx]
mov _clientSocket, ecx
mov ecx, [edx + 0x6C]; in disassembler too
mov _sendPacket, ecx;
}
}

if ((*(unsigned int*) (KiUserExceptDispADR + 10) + KiUserExceptDispADR < hNtDllStart) || (*(unsigned int*) (KiUserExceptDispADR + 10) + KiUserExceptDispADR > hNtDllEnd))
ErrorExit("Bot Program Detected #0!");

unsigned int retAddr = *((unsigned int*) &NetworkPacket - 1);

if ((retAddr < hEngineStart) || (retAddr > hEngineEnd))
ErrorExit("Bot Program Detected #1!");

if (NetworkPacket->subid == 0xFFFF)
{
switch (NetworkPacket->id)
{
case 0x2E:
decodeKey(NetworkPacket->data + 1);
break;
case 0x74:
_sendPacket(_clientSocket, .....);
break;
}
}

return true_AddNetworkQueue(This, EDX, NetworkPacket);
}

[wongerlt]

Thanks you!!!!!! work perfect :)
and this
SendPacket
im set as int SendPacket = NULL; is good or no? but it work and with it.

Добавлено через 22 часа 10 минут
Now i want send string to server.
im use:
_sendPacket(_clientSocket, "cs", 0xF9,"Test");
in l2j i use:
ReadS();
and i get in log this error:
Too many buffer underflow exceptions.

How to send text?

[Smwr]

maybe
_sendPacket(_clientSocket, "cS", 0xF9,L"Test");

[wongerlt]

Thanks you, work :)

[wongerlt]

Other question, how read next data, example
i send to client:
writeD(5);
writeD(6);
writeD(7);
now only first i can read in client with
NetworkPacket->data[0]
how read next?
im try with
NetworkPacket->data[1]
but result is 0

[ScythLab]

check NetworkPacket->size and all data:

for (int i = 0; i < NetworkPacket->size; i++)
{
... = NetworkPacket->data[i];
}

[wongerlt]

Ok i check it and write result :)
And im try make it: send to client gg query with random string like: hkcd68;!*_,!*(_@* and send back it encoded sha1 with strong 'salt' and check in server its correct or no. Its good for check gg?

p.s every time send different random string.

[wongerlt]

check NetworkPacket->size and all data:

for (int i = 0; i < NetworkPacket->size; i++)
{
... = NetworkPacket->data[i];
}


All work great, thanks.

New question:
How to check what packet are from server and what packet are from client at
AddNetworkQueue?
Thanks.

[Smwr]

All work great, thanks.

New question:
How to check what packet are from server and what packet are from client at
AddNetworkQueue?
Thanks.

from server in AddNetworkQueue, from client in SendPacket

[wongerlt]

Hello,
What can be wrong in this dll, because in windows xp got graphic lag in other windows 7/8/10 all fine.

[antonis]

hello all !

how can send packet on login server ?

[wongerlt]

any one know offset for H5?
__asm {
mov ebx, ecx
mov ecx, [ebx + 0x48] ; see offset in disassembler
mov edx, [ecx]
mov _clientSocket, ecx
mov ecx, [edx + 0x6C]; in disassembler too
mov _sendPacket, ecx;
}

[ScythLab]

wongerlt, 0x48 и 0x6C

[wongerlt]

hello again,
maybe some one have idea how send packet to client? or idea how to communicate with game interface?

[wongerlt]

all fixed. thanks.