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- Join Date
- Mar 2010
LInux socket programming - PPP protocol
Here I can mention my software requirements as follows.
I need to transfer data between PC (linux/windows based) and linux based hardware board
Method 1 :
Transfer using TCP/IP ( Ethernet card is interface ) protocol :
Here we can transfer data using socket programming .One PC acted as a server and other one as a client . I know this method .
Method 2 :
Transfer using PPP protocols ( RS 232 and serial cable interface) :
I am not very clear about this method. My doubts are as follows.
1) As per my understanding same socket program as I mentioned above can reuse in this case without any modification, because PPP is a data link layer protocol and If I open socket means we are directly communicate with TCP or UDP layer which is above Data link layer. If this is true
a) How I can make sure that in which route data is passing( Either ethernet layer / PPP layer ) ? Defenitely some configuration is required in order to select PPP or ethernet protocol in linux in application program.Assume that I am working only in application layer not in Kernel level.
b) Which is equivalent protocol for PPP if I use ethernet card ?
2) Here one more use case that is in windows. It is as follows.
One PC is running windows based tool , that is connected with linux based hardware.( RS 232 interface) . This is for modem dial up.
when I have press connect button in this tool, Internally source code is using windows RAS API with remote phone number (like RasDial()). As a result of this remote hardware (linux based hardware) will send back its IP address. Once IP address was obtained by windows based tool, it will open a socket and connect to port 2000 of Remote hardware . Here communication medium is RS 232 .
a) Is RAS service in windows make use of PPP protocol ? Here windows is using RAS service for dial up(to connect to remote linux hardware). How I can receive this data in remote linux hardware ? I dont think we can socket program here because I dont have remote linux hardware IP address now. So may be linux also have same kind of RAS service ? please clarify it ?
b) Here also once IP adress received, windows opening a socket and send data to linux hardware . But communication is through serial (PPP). Here how we can select specifically PPP(Normally we use ethernet protocol and ethernet card )
If you know any site regarding this , please forward to me .
- Join Date
- Feb 2009
Okay, I come from a network back ground, and could be approaching this wrong, but here's my take on things.
4 TCP UDP
3 IP IPX
2 ethernet / PPP
Reverse telnet You sure that IP it's getting is really the Linux device, it's not the Windows device's IP address, or a 3rd party piece of hardware with a different port number? Normally I'd just use in Windows something like Putty or Hyperterminal (minicom in Linux) to connect via a serial port into a another device. That port 2000 makes me think of terminal servers - Terminal server - see the section that has the heading Console Management - Rev Telnet, Rev SSH, and follow the link there for console managment.
Again, I may have this completely wrong, but I would check the cabling on exactly how you are connecting to those devices and what you are physically using. Sorry if I've got the wrong idea about what's happening here, please clarify if I've given bad info about another subject.