# Netconf server extension

**URL:** <https://dmap-community.ductus.global/t/netconf-server-extension/956>\
**Category:** Examples Set\
**Created:** [January 17, 2017, 2:42am UTC](https://dmap-community.ductus.global/t/netconf-server-extension/956 "2017-01-17T02:42:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Shri](https://avatars.discourse-cdn.com/v4/letter/s/e19adc/32.png) [@Shri](https://dmap-community.ductus.global/u/Shri)\
**Post date:** [January 17, 2017, 2:42am UTC](https://dmap-community.ductus.global/t/netconf-server-extension/956/1 "2017-01-17T02:42:00Z")

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Hi,

In order to write application on Netconf server extension using executables, does changes require in ConfD library/server code also to perform defined operation in yang file, or only we need to write yang file and executable (instrumentation) code.

Regards  
Shri Prakash

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**Author:** ![cohult](https://yyz2.discourse-cdn.com/flex010/user_avatar/dmap-community.ductus.global/cohult/32/221_2.png) [@cohult](https://dmap-community.ductus.global/u/cohult)\
**Post date:** [January 17, 2017, 6:21am UTC](https://dmap-community.ductus.global/t/netconf-server-extension/956/2 "2017-01-17T06:21:12Z")

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Hi,

A good way to understand the practical use of ConfD is to study the examples that come with ConfD. For example, you can take a look at the examples.confd/intro/1-2-3-start-query-model example and then modify it to work with the Linux Internet Systems Consortium DHCP Server:

> [@How to HUP the daemon in the intro/1-2-3-start-query-model example?](http://discuss.tail-f.com/t/how-to-hup-the-daemon-in-the-intro-1-2-3-start-query-model-example/180/3):
>
> Modified the example for running with the Internet Systems Consortium DHCP Server: $ dhcpd --version isc-dhcpd-4.3.1 $ diff -u ../../../examples.confd-orig/intro/1-2-3-start-query-model/dhcpd\_conf.c dhcpd\_conf.c --- ../../../examples.confd-orig/intro/1-2-3-start-query-model/dhcpd\_conf.c 2015-07-17 04:56:53.000000000 +0200 +++ dhcpd\_conf.c 2015-08-25 19:30:23.945732261 +0200 @@ -18,6 +18,8 @@ #include \<stdio.h\> #include \<unistd.h\> #include \<stdio.h\> +#include \<signal.h\> +#include \<fcntl.h\> …