RE: [OpenVMPS-devel] External program: answer not being accepted

[Sean B. <se...@bo...>]

Hi,

I'd should have posted a followup... in fact I was not separating stdin/out
properly.
Its working fine and looks like below. In fact its now quite intelligent and
detects hubs (assigning a vlan based on a lookupto see what vlan is already
active on a port), and allows a default vlan to be set per port (if needed).
I can share code if its of interest, but its very specific to my setup/DB
here..

Sean


logit("Connect to DB" );
db_connect();
while (true) {
  $in = fopen("php://stdin", "r");
  $out = fopen("php://stdout", "w");

  if ($out and $in) {
    $line=rtrim( fgets($in, 1024) ); 
    if (strlen($line) > 0) {
      list($domain, $switch, $port, $lastvlan, $mac)=explode(" ", $line);

    // The meat come here, decisional logic
  }
  fclose($in);
  fclose($out);
  #sleep(1);                 # wait 1 secs, before retrying
}

logit("Log /DB close, reconnect");
mysql_close($connect);
?>

> -----Original Message-----
> From: vmp...@li... 
> [mailto:vmp...@li...] On Behalf Of 
> David Smith
> Sent: mardi, 22. novembre 2005 13:39
> To: vmp...@li...
> Subject: RE: [OpenVMPS-devel] External program: answer not 
> being accepted
> 
> What I have is based differently. Can you try changing your 
> application?
> 
> $fd = fopen("php://stdin", "r");
> while (true) {
>      $line=rtrim( fgets($fd, 1024) );
>      if (strlen($line) > 0) {
>        list($domain, $switch, $port, $lastvlan, 
>  $mac)=explode(" ", $line);
>        echo("ALLOW $lastvlan\n");
>        flush();  // don't know if this needed, but doesn't  
> seem to matter
>      }
> }
> fclose($fd);
> 
> 
> The program will block on the read string until it gets 
> passed something.
> 
> The external application starts at the same time as vmpsd, or 
> at least the
> first time it's used.
> 
> The flush is required, maybe needing to specify stdout??
> 
> Dave
> System Administrator
> m/v Africa Mercy
> Mercy Ships
> tel: 0191 483 8413 ex 108
> fax: 0870 460 0764
> 
> 
> > -----Original Message-----
> > From: vmp...@li... 
> > [mailto:vmp...@li...] On Behalf Of 
> > Sean Boran
> > Sent: 04 November 2005 15:27
> > To: vmp...@li...
> > Subject: [OpenVMPS-devel] External program: answer not 
> being accepted
> > 
> > 
> > Hi,
> > 
> > I've having problems getting a basic external plug-in to work.
> > 
> > I have a simple PHP script:
> > 
> > while (true) {
> >   $fd = fopen("php://stdin", "r");
> > 
> >     $line=rtrim( fgets($fd, 1024) );
> >     if (strlen($line) > 0) {
> >       list($domain, $switch, $port, $lastvlan, 
> > $mac)=explode(" ", $line);
> >       echo("ALLOW $lastvlan\n");
> >       flush();  // don't know if this needed, but doesn't 
> > seem to matter
> >     }
> >   fclose($fd);
> >   sleep(1);                 # wait 1 secs, before retrying
> > }
> > 
> > The data arrives OK, but what I send back never seems to be 
> > sent by vmpsd,
> > I've tried
> >       echo("ALLOW $lastvlan\n\n");
> >       echo("ALLOW $lastvlan\n");
> >       echo("ALLOW $lastvlan");
> > 
> > but no luck.
> > 
> > IN vmpsd's external.c is seems to happen around here:
> >         write(tocli[1], str, strlen(str));
> >         n = readline(fromcli[0], buf, 255);
> > The first line seems to work fine, the second never comes back.
> > I added in
> >         vmps_log(VQP|DEBUG, ">>>> Sending: %s ", str);
> > before the "write" line and this works.
> > 
> > When I look at the code for readline() it seems to read char 
> > by char until
> > it hits 255 or \n. So it should work.
> > 
> > In syslog I see:
> > 
> > Nov  3 23:04:37 INOCESvmps1 vmpsd: 
> ==================================
> > Nov  3 23:04:37 INOCESvmps1 vmpsd: VQP Request
> > Nov  3 23:04:37 INOCESvmps1 vmpsd: Unknown: 1
> > Nov  3 23:04:37 INOCESvmps1 vmpsd: Request Type: 1
> > Nov  3 23:04:37 INOCESvmps1 vmpsd: Response: 0
> > Nov  3 23:04:37 INOCESvmps1 vmpsd: No. Data Items: 6
> > Nov  3 23:04:37 INOCESvmps1 vmpsd: Sequence No.: 4660
> > Nov  3 23:04:37 INOCESvmps1 vmpsd: Client IP address: 193.111.222.1
> > Nov  3 23:04:37 INOCESvmps1 vmpsd: Port name: Fa0/17
> > Nov  3 23:04:37 INOCESvmps1 vmpsd: Vlan name: test
> > Nov  3 23:04:37 INOCESvmps1 vmpsd: Domain name: Domain 
> > Nov  3 23:04:37 INOCESvmps1 vmpsd: MAC address: 080020b0cb95
> > Nov  3 23:04:37 INOCESvmps1 vmpsd: >>>> Sending: Domain 
> > 193.111.222.1 Fa0/17
> > switch1 0800.20b0.cb95
> > 
> > My external sends back: "ALLOW test", but vmpsd never sees it 
> > arriving and
> > vmpsd just sits there waiting.
> > 
> > Any sugsestions /tips?
> > 
> > Thanks,
> > 
> > Sean
> > 
> > 
> > 
> > 
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> 
> 
> 
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