BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  TelNet client demo needed Goto page 1, 2  Next          BorlandTalk.com Forum Index -> Delphi Internet Winsock View previous topic :: View next topic   Author Message AntonE Guest Posted: Sun May 06, 2007 5:47 am    Post subject: TelNet client demo needed I need to login to a router (from Delphi app) and run some commands & get their responses. Can anyone point me in the right direction? I'm using Indy 10's idTelNet component but do not know how to get responses back. No need for user input, the app will know what to say. Perhaps a demo app will get me going? Thanks Back to top AntonE Guest Posted: Sun May 06, 2007 8:11 am    Post subject: Re: TelNet client demo needed Here is my problem: idTelNEt1.Host:=IPS2IP(MikIP.AsString); idTelnet1.Connect; idTelNEt1.IOHandler.WriteLn(MikUserNAme.AsString); idTelNEt1.IOHandler.WriteLn(MikPW .AsString); idTelNEt1.IOHandler.WriteLn('system'); idTelNEt1.IOHandler.WriteLn('pack'); idTelNEt1.IOHandler.WriteLn('print'); but when the proc exit, I just get all the commands as if it was put into the first prompt and at the end I get password prompt, which should be after the username thingy... BUT, if I make it: idTelNEt1.Host:=IPS2IP(MikIP.AsString); idTelnet1.Connect; idTelNEt1.IOHandler.WriteLn(MikUserNAme.AsString); (**) ShowMessage(IntToStr(idTelNet1.IOHandler.RecvBufferSize)); idTelNEt1.IOHandler.WriteLn(MikPW .AsString); (**) ShowMessage(IntToStr(idTelNet1.IOHandler.RecvBufferSize)); .... then apart from the annoying popups, I get the router responses correctly in OnDataAvailable... Maybe some threading issue? idTelNet.ThreadedEvent=False Back to top theo Guest Posted: Sun May 06, 2007 7:40 pm    Post subject: Re: TelNet client demo needed I guess you have to wait for server response before sending the next command. I don't know Indy well. It's probably easier with Synapse: http://synapse.ararat.cz/ http://synapse.ararat.cz/docs/help/tlntsend.TTelnetSend.html Back to top Remy Lebeau (TeamB) Guest Posted: Mon May 07, 2007 10:54 pm    Post subject: Re: TelNet client demo needed "AntonE" <antone (AT) true (DOT) co.za> wrote in message news:463d2510 (AT) newsgroups (DOT) borland.com... Quote: I'm using Indy 10's idTelNet component Why? Router's rarely use Telnet to begin with. Usually HTTP, but sometimes SNMP as well. Quote: but do not know how to get responses back. TIdTelnet has an OnDataAvailable event. But chances are, you should be using TIdHTTP instead. It really depends on the particular type of router you are using, and how users normally configure it by hand. Gambit Back to top AntonE Guest Posted: Tue May 08, 2007 12:58 am    Post subject: Re: TelNet client demo needed It is a Mikrotik router (www.mikrotik.com) running on a routerboard (www.routerboard.com) and yes, it has a http interface, but very limited, only TelNet and propriety prog called WinBox can access full settings. If I want to program externally, automatically, only option is Telnet. Running a wireless network (all clients & APs have them) so if I need to block a client or restrict speed, etc. etc. I need to do it manually as the management software is written by me, but without TelNet, I cannot let my app change router settings. To get back to the point, please have a look at my post 'Telnet followup...' on atozedsoftware.indy.client.tcp forum for more details, I think I'm almost there but as a tradional DB developer, the whole Indy thing is new to me. Thanks for the response AntonE "Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote in message news:463f67c6$1 (AT) newsgroups (DOT) borland.com... Quote: "AntonE" <antone (AT) true (DOT) co.za> wrote in message news:463d2510 (AT) newsgroups (DOT) borland.com... I'm using Indy 10's idTelNet component Why? Router's rarely use Telnet to begin with. Usually HTTP, but sometimes SNMP as well. but do not know how to get responses back. TIdTelnet has an OnDataAvailable event. But chances are, you should be using TIdHTTP instead. It really depends on the particular type of router you are using, and how users normally configure it by hand. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Tue May 08, 2007 2:13 am    Post subject: Re: TelNet client demo needed "AntonE" <antone (AT) true (DOT) co.za> wrote in message news:463f848a (AT) newsgroups (DOT) borland.com... Quote: It is a Mikrotik router (www.mikrotik.com) running on a routerboard (www.routerboard.com) and yes, it has a http interface, but very limited, only TelNet and propriety prog called WinBox can access full settings. If I want to program externally, automatically, only option is Telnet. Running a wireless network (all clients & APs have them) so if I need to block a client or restrict speed, etc. etc. I need to do it manually as the management software is written by me, but without TelNet, I cannot let my app change router settings. Are you absolutely sure that it is using the Telnet protocol specifically, or just plain TCP/IP in general? Gambit Back to top AntonE Guest Posted: Tue May 08, 2007 3:24 am    Post subject: Re: TelNet client demo needed Quote: Are you absolutely sure that it is using the Telnet protocol specifically, or just plain TCP/IP in general? Well, I can log into it from Windows command prompt : "Telnet 10.1.12.12' and then follow login & commands, etc. If that is what you mean? It is a Linux kernel based software that is loaded, you can also load Debian on it, but I prefer the Mikrotik software because it is fantastic. I.o.w not the usual router. I also have some DLink AP's (DWL-2000AP) which I sometimes use Telnet on, but they wouldn't be involved in this issue. I basically just need a way to tell Indy to 'tick-over' (lack of better wording) as when I add a ShowMessage command (to pass control to the app main thread(?)) between my idTelnet commands, all works ok, but just running them in sequence causes the 'problem'. AntonE Back to top AntonE Guest Posted: Tue May 08, 2007 3:32 am    Post subject: Re: TelNet client demo needed Quote: Are you absolutely sure that it is using the Telnet protocol specifically, or just plain TCP/IP in general? The manual also state Telnet as being the interface of choice and if you have a look at the other post I mentioned, you'll see that I get some good results with idTelnet, I just need to be able to do it all in one proc, without getting into threading and stuff as I've never threaded before and this part of the app is really so simple. Thanks for the reply AntonE Back to top Remy Lebeau (TeamB) Guest Posted: Tue May 08, 2007 3:48 am    Post subject: Re: TelNet client demo needed "AntonE" <antone (AT) true (DOT) co.za> wrote in message news:463fa6c6 (AT) newsgroups (DOT) borland.com... Quote: Well, I can log into it from Windows command prompt : "Telnet 10.1.12.12' and then follow login & commands, etc. That does not mean that the Telnet protocol specifically is being used, though. You can use the Telnet app to connect to any TCP-based system. But the Telnet protocol itself is a specific type of TCP-based protocol, and thus has its own rules about how data is exchanged between client and server. Unless the system is actually using the Telnet protocol, then those rules may corrupt your data and/or cause hangs/crashes. I suggest you using TIdTCPClient directly instead of TIdTelnet until you determine exactly what protocol the router is really using. Chances are, it will not be using the actual Telnet protocol at all. Quote: It is a Linux kernel based software that is loaded That is irrelevant. Th OS does not matter in this situation. Gambit Back to top Remy Lebeau (TeamB) Guest Posted: Tue May 08, 2007 3:49 am    Post subject: Re: TelNet client demo needed "AntonE" <antone (AT) true (DOT) co.za> wrote in message news:463fa87c (AT) newsgroups (DOT) borland.com... Quote: The manual also state Telnet as being the interface of choice Telnet the PROGRAM or Telnet the PROTOCOL, though? There is a big difference. What EXACTLY does the manual say about all of this? Quote: if you have a look at the other post I mentioned, you'll see that I get some good results with idTelnet, I just need to be able to do it all in one proc Then you shouldn't be using TIdTelnet, as that is not how it was designed to be used. Use TIdTCPClient directly instead. Gambit Back to top AntonE Guest Posted: Tue May 08, 2007 4:32 am    Post subject: Re: TelNet client demo needed Quote: Telnet the PROGRAM or Telnet the PROTOCOL, though? There is a big difference. What EXACTLY does the manual say about all of this? This is what I could find: MikroTik RouterOS has a build-in Telnet server and client features. These two are used to communicate with other systems over a network. .... Telnet protocol is intended to provide a fairly general, bi-directional, eight-bit byte oriented communications facility. The main goal is to allow a standard method of interfacing terminal devices to each other. MikroTik RouterOS implements industry standard Telnet server. It uses port 23, which must not be disabled on the router in order to use the feature. You can enable/disable this service or allow the use of the service to certain IP addresses. Quote: Then you shouldn't be using TIdTelnet, as that is not how it was designed to be used. Use TIdTCPClient directly instead. Being a newcommer to TCP stuff, would you be so kind as to explain how I can then do this talk/listen idea or just point me to a demo of some sort. Back to top Remy Lebeau (TeamB) Guest Posted: Tue May 08, 2007 6:35 am    Post subject: Re: TelNet client demo needed "AntonE" <antone (AT) true (DOT) co.za> wrote in message news:463fb6b2 (AT) newsgroups (DOT) borland.com... Quote: MikroTik RouterOS has a build-in Telnet server and client features. Fair enough. Quote: Being a newcommer to TCP stuff, would you be so kind as to explain how I can then do this talk/listen idea I explained that in reply to your messages in the Indy newsgroups. Gambit Back to top theo Guest Posted: Tue May 08, 2007 2:49 pm    Post subject: Re: TelNet client demo needed Quote: Being a newcommer to TCP stuff, would you be so kind as to explain how I can then do this talk/listen idea or just point me to a demo of some sort. I'm still convinced that Synapse is better suited for this kind of job. It's a simple write-read-write-read.. scenario. This is exactly how Synapse works. See: http://synapse.ararat.cz/docs/help/tlntsend.TTelnetSend.html You really don't need events and threads for this. Back to top AntonE Guest Posted: Tue May 08, 2007 10:52 pm    Post subject: Re: TelNet client demo needed Thanks toby. I tried it, but I only get first line after 'login' command back, after that no 'response' from server. procedure TForm1.BitBtn1Click(Sender: TObject); var TN : TTelnetSend; begin TN:=TTelnetSend.Create; TN.TargetHost:='10.1.12.12'; TN.TargetPort:='23'; TN.Timeout:=1000; TN.Login; Memo1.Lines.Add(TN.RecvString); TN.Send('admin'); Memo1.Lines.Add(TN.RecvString); TN.Send('blah'); Memo1.Lines.Add(TN.RecvString); TN.Send('sys'); Memo1.Lines.Add(TN.RecvString); TN.Send('pack'); Memo1.Lines.Add(TN.RecvString); TN.Send('pr'); Memo1.Lines.Add(TN.RecvString); TN.Logout; end; Back to top Remy Lebeau (TeamB) Guest Posted: Wed May 09, 2007 12:03 am    Post subject: Re: TelNet client demo needed "AntonE" <antone (AT) true (DOT) co.za> wrote: Quote: Thanks toby. I tried it, but I only get first line after 'login' command back, after that no 'response' from server. Does Send() automatically send a CRLF at the end of the string? Sounds like it doesn't, but the server is likely expecting that. 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