Re: PING in a CL-program

["David Gibbs" <devdmg@xxxxxxxxxxxxxxxxxxxxxxxx>]

On  6 Aug 97 at 11:42, Staffan Lofberg wrote:

> I am trying to check if another host is active in batch mode. I am
> using PING. How can I determine if I get the message TCP3206 in a
> CL-program?

This should do the trick... although I give no guarantees.  I had to 
dredge this code up from the depths of my brain.

DCL        VAR(&HOST) TYPE(*CHAR) LEN(256)
DCL        VAR(&MSG) TYPE(*CHAR) LEN(256)           
DCL        VAR(&MSGID) TYPE(*CHAR) LEN(7)           
DCL        VAR(&MSGDTA) TYPE(*CHAR) LEN(256)        
DCL        VAR(&MSGDTALEN) TYPE(*DEC) LEN(5 0)      
DCL        VAR(&PERCENT) TYPE(*DEC) LEN(3 0)        
DCL         VAR(&WORK) TYPE(*CHAR) LEN(4)            

PING       RMTSYS(&HOST) MSGMODE(*QUIET)       
MONMSG     MSGID(TCP0000)   /* handle any monitorable msgs */
                        
RCVMSG     MSGQ(*PGMQ) MSGTYPE(*LAST) RMV(*NO) +    
                          MSG(&MSG) MSGDTA(&MSGDTA) +           
                          MSGDTALEN(&MSGDTALEN) MSGID(&MSGID)    +
                          /* grab the last message on the queue */

CHGVAR     VAR(&WORK) VALUE(%SST(&MSGDTA 9 4))    +
                       /* extract the connection summary percentage +
                       */
CHGVAR     VAR(&PERCENT) VALUE(%BIN(&WORK))       +
                      /* convert it to decimal */

If &PERCENT is greater than 0, then you were able to get a 
connection... otherwise, the remote host was not responding.  If 
&PERCENT is less than 100, then your connection is not necessarily as 
stable as you might like it.

You might want to add some code to make sure you are receiving 
message TCP3210, which contains the connection summary.

david
--

David Gibbs
Sr. Software Engineer
Silvon Software
Westmont, IL
(630) 655-3313 x6479
http://www.silvon.com
mailto:david.gibbs@silvon.com

Opinions expressed are strictly my own and do 
not necessarily reflect those of my employer

... You'll only see your obstacles each time 
    you take your eyes off of your goal.

                   -- DMRoth
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