sercd January 2005

sercd@lists.lysator.liu.se

3 participants
3 discussions

use of cyclades-serial-client with CISCO AS
by Francesco Ciacca (Consultant) 28 Jan '05

28 Jan '05

Hi Peter, if you remember, i wrote you some time ago for a question about using cyclades-serial-client in conjuction with sercd. Thanx again for your help at that time. Now my company bought a CISCO AS5350, and that device will be used in my project. To be more precise, we want to use it from the linux client by means of the cyclades-serial-client. As i said, everythings worked for me until we used the sercd as server, and we were confident to be compliant also with the Cisco AS as long as they both use RFC2217. But the first when i tried to connect the cyclades-ser-cli to the CISCO AS i discovered that the solution doesn't work anymore. I tried to look in the log, the code and around the web (reaching mostly content from you) and now i think that there are some difference on the RFC2217 implementation. First of all, speed : the Cisco (as also i read in a newsgroup thread) report speed not as it receives it. Other differences: command-notification sequence: the cyclades-ser-cli blocks waiting for a response from the server, but in the case of SET_MODEMSTATE_MASK and SET_LINESTATE_MASK the Cisco doesn't send any notifycation back. I modified the code ignoring the speed sent back by the Cisco and making the two commands not blocking, but still it doesnt'work. Have you ever tried a CISCO AS as a server form cyclades-serial-client? Do you now what are the big differences between it and sercd? Con you help me in some manner to make cyclades-serial-client work also with CISCO AS? Best Regards and thanx a lot in advance Francesco Ciacca

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Re: [sercd] What do I need to do ?
by Conn Clark 06 Jan '05

06 Jan '05

Peter Åstrand wrote: >> Thanks for writing this. I'm trying to figure out how to use this >>software to connect the serial port from one machine to the serial port >>of another machine over a network, or at least this is my eventual goal. > > > >>./cyclades-ser-cli -x -m 1 -p 7999 /dev/ptypx 172.16.32.3 1 >>cyclades-ser-cli /dev/ptypx: NOTICE: Using /dev/pts/1 pseudo-tty >>cyclades-ser-cli /dev/ptypx: NOTICE: Using 172.16.32.3:8000 socket >>cyclades-ser-cli /dev/ptypx: WARNING: Can't initiate connection on a >>socket : Connection refused >>cyclades-ser-cli /dev/ptypx: WARNING: Trying again ... >>cyclades-ser-cli /dev/ptypx: WARNING: Can't initiate connection on a >>socket : Connection refused >>cyclades-ser-cli /dev/ptypx: ERR: signal 2 received ( 21, 0%, 0%, >> 0%) >> >>What am I doing wrong? > > > Obviously, 172.16.32.3 does not listen on port 8000. You can verify this > with "telnet 172.16.32.3 8000". Have you restarted xinetd, and checked > it's log files? You can try running xinetd in debug mode with -d. > When I try connecting to 172.16.32.3 using telnet I get a "Connection refused" I did try restarting xinetd, I even rebooted just to be sure. Here is what xinetd spits out when I try and run the cyclades client from the other machine with debug enabled. 05/1/6@10:07:03: DEBUG: {main_loop} select returned 1 05/1/6@10:07:03: DEBUG: {server_start} Starting service telnet 05/1/6@10:07:03: DEBUG: {main_loop} active_services = 2 05/1/6@10:07:03: DEBUG: {exec_server} duping 7 When I kill it it spits this out 05/1/6@10:11:56: DEBUG: {check_flags} flag entry 0 processed 05/1/6@10:11:56: DEBUG: {child_exit} waitpid returned = 2590 05/1/6@10:11:56: DEBUG: {server_end} telnet server 2590 exited 05/1/6@10:11:56: DEBUG: {child_exit} waitpid returned = -1 05/1/6@10:11:56: DEBUG: {main_loop} active_services = 2 running minicom with the command "minicom -p /dev/ptypx" gives me a login prompt to 172.16.32.3 so I think its starting telnet instead of sercd. -- Conn ***************************************************************** Give a man a match and you heat him for a moment. Set him on fire and you'll heat him for life. ***************************************************************** Conn Clark Engineering Stooge clark(a)esteem.com Electronic Systems Technology Inc. www.esteem.com Stock Ticker Symbol ELST

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What do I need to do ?
by Conn Clark 05 Jan '05

05 Jan '05

Hi, Thanks for writing this. I'm trying to figure out how to use this software to connect the serial port from one machine to the serial port of another machine over a network, or at least this is my eventual goal. Right now I can't figure out how to get it to work just using the cyclades-serial-client-0.93 . Here is what I have done so far. I added the following line to my /etc/services sredir 8000/tcp # serial port redirector I used 8000 because 7000 was used for something else. I'm using xinetd and here is my config file for that # default: on # description: RFC 2217 compliant Telnet serial port redirector service sredir { type = UNLISTED flags = REUSE socket_type = stream protocol = tcp wait = no user = root server = /usr/local/sbin/sercd server_args = 5 /dev/ttyS0 /var/lock/LCK..ttyS0 port = 8000 disable = no # Some versions of xinetd does not work with only_from=localhost # only_from = localhost } I then try to start the cyclades client on the remote machine and get the following ./cyclades-ser-cli -x -m 1 -p 7999 /dev/ptypx 172.16.32.3 1 cyclades-ser-cli /dev/ptypx: NOTICE: Using /dev/pts/1 pseudo-tty cyclades-ser-cli /dev/ptypx: NOTICE: Using 172.16.32.3:8000 socket cyclades-ser-cli /dev/ptypx: WARNING: Can't initiate connection on a socket : Connection refused cyclades-ser-cli /dev/ptypx: WARNING: Trying again ... cyclades-ser-cli /dev/ptypx: WARNING: Can't initiate connection on a socket : Connection refused cyclades-ser-cli /dev/ptypx: ERR: signal 2 received ( 21, 0%, 0%, 0%) What am I doing wrong? Thank You, -- Conn Clark ***************************************************************** Give a man a match and you heat him for a moment. Set him on fire and you'll heat him for life. ***************************************************************** Conn Clark Engineering Stooge clark(a)esteem.com Electronic Systems Technology Inc. www.esteem.com Stock Ticker Symbol ELST

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sercd January 2005