Hi
Somewhat of a newbie...so bear with me.
Trying to telnet or ssh to a device, so I need to find out which port is open (both maybe) in order to system() afterwards...
I would like to do this in C, even tho perl has Net::Telnet::cisco and ::SSH too, but will probably get hammered for this !
Also, how do I send characters to a program spawned by system() ?
You'll need to do some socket programming. Beej's guide is a great socket programming resource:I need to find out which port is open (both maybe) in order to system() afterwards...
http://beej.us/guide/bgnet/output/ht...age/bgnet.html
Check out popen(). Use it instead of system().Also, how do I send characters to a program spawned by system() ?
If you understand what you're doing, you're not learning anything.
Why not just use nmap? It's designed for this purpose.Originally Posted by Mikey
NoCanDo on that programming...not enuf time, the goal can easily be accomplished by a port scanner, but I'd -really like to put it in my 'beginners' C program as findport(port#) which would work off a list in a text file possibly. I'm using Watcom free C, and might be better off using perl but C is just so cool, so do-anything...
[cough]ping it[/cough]
meow.
How would a ping tell you if a specific port is open? The only way to find out is to try to connect to the port.
Go through the man pages for "nmap"
Will help.
Hey again, from a newbie to C and perl...
What I'm starting out to do, is test if 23 (telnet) is open, if it is, then I need to install SSH on a list of cisco boxes, SSH to the box, and if successful, remove telnet via that session, SSH again, and if error=0, disconnect all.
I've been 'not exactly happy' with perl...Net::Telnet::Cisco etc etc... Seems everyone has a compiler (or what is it exactly, does anyone really know ?) and the whole perl 'thing' is so disorganized, some things work, some don't, "some they will, some they won't, and some it's just as well".
I like C more. It seems more exact...like the diff between unix and windoze.
