dhcpleasequery problems - 4.2.2

Jack Kielsmeier jackkiel at netins.net
Tue Oct 18 17:44:19 UTC 2011


I get an error when re-compiling the source. I have the following commented
out:

                if (lease->ends > cur_time) {
/*                      if (time_expiry < cur_time) {

 *                              log_error("Impossible condition at %s:%d.",

 *                                        MDL);

 *

 *                              option_state_dereference(&options, MDL);

 *                              lease_dereference(&lease, MDL);

 *                              return;

 */                     }
                        time_expiry = htonl(lease->ends - cur_time);
                        if (!add_option(options,
                                        DHO_DHCP_LEASE_TIME,
                                        &time_expiry,
                                        sizeof(time_expiry))) {
                                option_state_dereference(&options, MDL);
                                lease_dereference(&lease, MDL);
                                log_info("%s: out of memory, no reply sent",
                                         msgbuf);
                                return;
                        }
                }

Line 498 is " time_expiry = htonl(lease->ends - cur_time);", but I believe
that needs stay in? Or should that be commented out as well. If it's
commented out it does compile (but I have not tested leasequeries with it
yet).

With line 498 left in, I get the following when compiling:

dhcpleasequery.c:668: warning: data definition has no type or storage class
dhcpleasequery.c:669: error: syntax error before '&' token
dhcpleasequery.c:669: warning: type defaults to `int' in declaration of
`option_state_dereference'
dhcpleasequery.c:669: warning: data definition has no type or storage class
dhcpleasequery.c:670: error: syntax error before '&' token
dhcpleasequery.c:670: warning: type defaults to `int' in declaration of
`lease_dereference'
dhcpleasequery.c:670: warning: data definition has no type or storage class
dhcpleasequery.c:672: error: syntax error before '.' token
dhcpleasequery.c:676: error: syntax error before '.' token
dhcpleasequery.c:701: error: syntax error before string constant
dhcpleasequery.c:703: warning: type defaults to `int' in declaration of
`log_info'
dhcpleasequery.c:703: warning: type defaults to `int' in declaration of
`dbg_info'
dhcpleasequery.c:703: warning: type defaults to `int' in declaration of
`assoc_ip_cnt'
dhcpleasequery.c:703: error: syntax error before ')' token
dhcpleasequery.c:706: error: syntax error before numeric constant
dhcpleasequery.c:711: warning: type defaults to `int' in declaration of
`send_packet'
dhcpleasequery.c:711: warning: data definition has no type or storage class
gmake[1]: *** [dhcpd-dhcpleasequery.o] Error 1
gmake[1]: Leaving directory `/usr/local/src/dhcp-4.2.2/server'
gmake: *** [all-recursive] Error 1

Code starting at 668 is:

        data_string_forget(&prl, MDL);  /* SK: safe, even if empty */
        option_state_dereference(&options, MDL);
        lease_dereference(&lease, MDL);

        to.sin_family = AF_INET;
#ifdef HAVE_SA_LEN
        to.sin_len = sizeof(to);
#endif

Any advice is appreciated. Thank You,

-
Jack Kielsmeier
netINS Systems Administrator
systems at netins.net


-----Original Message-----
From: dhcp-users-bounces+jackkiel=netins.net at lists.isc.org
[mailto:dhcp-users-bounces+jackkiel=netins.net at lists.isc.org] On Behalf Of
Jack Kielsmeier
Sent: Tuesday, October 18, 2011 8:50 AM
To: 'Users of ISC DHCP'
Subject: RE: dhcpleasequery problems - 4.2.2

Whoops, good catch on the line number.

I will test removing the code in question to see if the queries function. I
will report back on the results.

Thank You,

-
Jack Kielsmeier
netINS Systems Administrator
systems at netins.net


-----Original Message-----
From: dhcp-users-bounces+jackkiel=netins.net at lists.isc.org
[mailto:dhcp-users-bounces+jackkiel=netins.net at lists.isc.org] On Behalf Of
Shawn Routhier
Sent: Monday, October 17, 2011 5:20 PM
To: Users of ISC DHCP
Subject: Re: dhcpleasequery problems - 4.2.2


On Oct 17, 2011, at 12:10 PM, Jack Kielsmeier wrote:

> Hello,
> 
> We are running ISC DHCP 4.2.2 in a redundant fashion (failover peer) 
> in Solaris 11 zones (compiled from source).
> 
> Recently, we have determined that we need to make use of the DHCP 
> leasequery option. In testing, we notice the following occurring in 
> our
logs:
> 
> ------------ LOGS ------------
> 
> Oct 17 13:19:03 dhcp-dsm dhcpd: [ID 702911 local5.error] Impossible 
> condition at dhcpleasequery.c:492.
> Oct 17 13:19:09 dhcp-dsm dhcpd: [ID 702911 local5.error] Impossible 
> condition at dhcpleasequery.c:492.
> Oct 17 13:19:15 dhcp-dsm dhcpd: [ID 702911 local5.error] Impossible 
> condition at dhcpleasequery.c:492.
> Oct 17 13:19:21 dhcp-dsm dhcpd: [ID 702911 local5.error] Impossible 
> condition at dhcpleasequery.c:492.
> Oct 17 13:22:34 dhcp-dsm dhcpd: [ID 702911 local5.error] Impossible 
> condition at dhcpleasequery.c:492.
> Oct 17 13:22:39 dhcp-dsm dhcpd: [ID 702911 local5.error] Impossible 
> condition at dhcpleasequery.c:492.
> 
> ------------ END LOGS ------------
> 
I think you want line 492 not 432

> Line 432 looks like this:
> 
> lease_dereference(&lease, MDL);
> 
> 

Line 492 deals with checking the lease ends time against the current time.
It also appears to have a bug.  I'll have to go look at the history to
figure out what it thinks it's doing.

It appears that you can simply remove the code from 490 to 498
	if (time_expiry < cur_time {
		stuff
	}

But I haven't tested that or verified that the time_expiry isn't being used
in some odd way I don't understand yet.  If you do test it we would be
interested in the results.

> Any assistance with this matter would be greatly appreciated. I do not 
> know what else to provide (such as the entire dhcpd.conf file, which 
> is pretty long).
> 
> Thank You,
> 
> -
> Jack Kielsmeier
> netINS Systems Administrator
> systems at netins.net
> 



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