[Kea-users] Getting the interface name in hooks

[Gokulakrishnan Gopalakrishnan]

Thanks. Replacing with getStagingCfg() worked well.

On Wed, Aug 23, 2017 at 11:32 PM, Marcin Siodelski <marcin at isc.org> wrote:

> That's because the load() function is called as a result of parsing
> server configuration when your hook library is loaded. At this point
> there is no committed server configuration yet (because server
> configuration is being parsed). What you could try is:
>
> ConstCfgIfacePtr cfg =  CfgMgr::instance().getStagingCfg()->getCfgIface();
>
> instead of
>
> ConstCfgIfacePtr cfg =  CfgMgr::instance().getCurrentCfg()->getCfgIface();
>
> because "staging" configuration should already contain the information
> about interfaces (the interfaces parser is launched before the hooks
> libs parser).
>
> Give it a try.
>
> Marcin
>
> On 23.08.2017 19:57, Gokulakrishnan Gopalakrishnan wrote:
> > Marcin,
> > When I placed the code in "load(LibraryHandle&), I'm getting empty
> > interface list, whereas if I keep the code in another hook like
> > pkt4_send, I'm getting the proper list of interfaces.
> > Actually, I'd be needing this info while initializing the Kea Process
> > itself. Can we get it somehow?
> >
> > On Wed, Aug 23, 2017 at 8:02 PM, Gokulakrishnan Gopalakrishnan
> > <ggopalakrishnan at salesforce.com <mailto:ggopalakrishnan at salesforce.com>>
> > wrote:
> >
> >     Thanks Marcin. It worked
> >
> >     On Wed, Aug 23, 2017 at 4:28 PM, Marcin Siodelski <marcin at isc.org
> >     <mailto:marcin at isc.org>> wrote:
> >
> >         You'd rather need to link with this:
> >
> >         libdhcp_user_chk_la_LIBADD  +=
> >         $(top_builddir)/src/lib/dhcpsrv/libkea-dhcpsrv.la
> >         <http://libkea-dhcpsrv.la>
> >
> >         In most cases you'd also need to link with libkea-dhcpsrv.la
> >         <http://libkea-dhcpsrv.la>
> >         dependencies which you can find it its Makefile.am.
> >
> >         As for the automake error it seems to me that you're missing
> >         automake-1.14. Perhaps you have some different version?
> >         automake-1.15?
> >
> >         Maybe go to Kea root directory and run autoreconf --install &&
> >         ./configure ... && make
> >
> >         again.
> >
> >         Marcin
> >
> >         On 23.08.2017 12:41, Gokulakrishnan Gopalakrishnan wrote:
> >         > Thanks Marcin, I just did what you mentioned in the code and
> >         > printed *iface_configuation->str()* and it prints an empty
> array
> >         > interface. Probably because I didn't link the hook user_chk
> >         > with *libkea-dhcpsrv*.
> >         > I tried linking* **libkea-dhcpsrv *by adding
> >         >
> >         > libdhcp_user_chk_la_LIBADD  +=
> >         $(top_builddir)/src/lib/hooks/libkea-dhcpsrv.la
> >         <http://libkea-dhcpsrv.la> <http://libkea-dhcpsrv.la>
> >         >
> >         > in src/hooks/dhcp/user_chk/Makefile.am <http://efile.am> and
> > did a make.
> >         >
> >         > I'm getting automake-1.14: command not found. Every time
> editing
> >         > Makefile.am, I'm getting this error. Am I doing the linking
> > correctly?
> >         > Am I missing something here? Please correct me if I'm wrong
> >         >
> >         >
> >         >
> >         >
> >         > On Wed, Aug 23, 2017 at 3:09 PM, Marcin Siodelski
> > <marcin at isc.org <mailto:marcin at isc.org>
> >         > <mailto:marcin at isc.org <mailto:marcin at isc.org>>> wrote:
> >         >
> >         >     On 23.08.2017 11:24, Gokulakrishnan Gopalakrishnan wrote:
> >         >     > "interfaces-config": {
> >         >     >
> >         >     >         "interfaces": [ "eth0" ]
> >         >     >
> >         >     >   }
> >         >     >
> >         >     > Can we get the list of interface name in hooks code? In
> >         the example
> >         >     > mentioned above, can we get the value "eth0" in hooks
> >         code in
> >         >     > <int load(LibraryHandle&)> function?
> >         >     >
> >         >     >
> >         >
> >         >     To retrieve server configuration information you'd need to
> >         link your
> >         >     hook library with libkea-dhcpsrv and do something like
> this:
> >         >
> >         >     #include <dhcpsrv/cfg_iface.h>
> >         >
> >         >     ConstCfgIfacePtr cfg =
> >         >     CfgMgr::instance().getCurrentCfg()->getCfgIface();
> >         >     ElementPtr iface_configuation = cfg->toElement();
> >         >
> >         >     The iface_configuration will now hold the conifguration
> >         structure you're
> >         >     looking for.
> >         >
> >         >     Marcin Siodelski
> >         >     ISC
> >         >
> >         >
> >
> >
> >
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/kea-users/attachments/20170824/8034a7dd/attachment.htm>