topic Re: How does JSL receive network packets in memory? in Discussions

How does JSL receive network packets in memory?

lwx228 — Fri, 09 Jun 2023 18:04:04 GMT

I wonder if JMP can use JSL to receive network packets in memory and save these data as tables.

Since I'm not a programmer, this title may be inaccurate.

Thanks Experts!

Re: How does JSL receive network packets in memory?

ih — Thu, 28 Oct 2021 21:27:27 GMT

How would the packets arrive? Would you go to a website and download something, or would JMP be waiting for incoming traffic on a specific port?

Re: How does JSL receive network packets in memory?

lwx228 — Fri, 29 Oct 2021 09:32:18 GMT

Thank you for your attention.

I found the C++ development code that calls this data interface.

// STKDRV.h: interface for the CSTKDRV class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_STKDRV_H__4BE51F0E_A261_11D2_B30C_00C04FCCA334__INCLUDED_)
#define AFX_STKDRV_H__4BE51F0E_A261_11D2_B30C_00C04FCCA334__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class CSTKDRV  
{
public:
	CSTKDRV();
	virtual ~CSTKDRV();
public:
	DWORD Getd2DrvInfo(int nInfo,void * pBuf);
	int SetupReceiver(BOOL bSetup);
	int d2_Quit(HWND hWnd);
……
private:
	void GetAdress();
	wchar_t *CharToWChar(char *pszString);
	HINSTANCE	m_hSTKDrv;
};

#endif // !defined(AFX_STKDRV_H__4BE51F0E_A261_11D2_B30C_00C04FCCA334__INCLUDED_)

It seems complicated.

Re: How does JSL receive network packets in memory?

ih — Fri, 29 Oct 2021 11:24:31 GMT

Sorry I will not be any help reverse engineering this for you, but if you are looking for a program to receive messages that are sent by another program or computer, perhaps the server side logic in this post will help.

Re: How does JSL receive network packets in memory?

lwx228 — Fri, 29 Oct 2021 13:11:56 GMT

Thank you for the good way. I try to learn.

Re: How does JSL receive network packets in memory?

bryan_boone — Mon, 01 Nov 2021 17:14:24 GMT

If you are trying to retrieve data from a website, you can look at HTTP Request. It covers simple "GET"s as well as "POST", "PATCH", "PUT" and so on.

-Bryan

Re: How does JSL receive network packets in memory?

lwx228 — Tue, 02 Nov 2021 14:26:36 GMT

This packet is received through a program to receive the memory.
C++, VB and other development software in memory to read the data, save as a table.

Sending a packet every three seconds.Is always waiting to receive.

So I want to use JMP instead of VB to read and save these data.

Thanks Experts!

Re: How does JSL receive network packets in memory?

ih — Tue, 02 Nov 2021 16:10:42 GMT

It sounds like the socket communication link should give you the framework you need to get started then, you need to figure out what port to listen on and then write a function to handle the data as it comes in, for example by writing it to a data table.

Re: How does JSL receive network packets in memory?

lwx228 — Thu, 04 Nov 2021 06:24:17 GMT

Thanks to the expert, I'm learning your way.

Writing code in VB is required to call the program to the specified DLL.
I combine VB code to try to prepare.