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

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vmps-devel

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

From: Sean B. <se...@bo...> - 2005-11-04 15:27:35

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

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

From: David S. <dav...@me...> - 2005-11-22 12:39:33

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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>

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

From: Sean B. <se...@bo...> - 2005-11-22 14:36:00

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
> > 
> > 
> > 
> > 
> > -------------------------------------------------------
> > SF.Net email is sponsored by:
> > Tame your development challenges with Apache's Geronimo App 
> > Server. Download
> > it for free - -and be entered to win a 42" plasma tv or 
> your very own
> > Sony(tm)PSP.  Click here to play: 
> http://sourceforge.net/geronimo.php
> > _______________________________________________
> > Vmps-devel mailing list
> > Vmp...@li...
> > https://lists.sourceforge.net/lists/listinfo/vmps-devel
> > 
> 
> 
> 
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