Over on the [Data Driven Security Blog](http://datadrivensecurity.info/blog/posts/2014/Apr/making-better-dns-txt-record-lookups-with-rcpp/) there’s a post on how to use `Rcpp` to interface with an external library (in this case `ldns` for DNS lookups). It builds on [another post](http://datadrivensecurity.info/blog/posts/2014/Apr/firewall-busting-asn-lookups/) which uses `system()` to make a call to `dig` to lookup DNS `TXT` records.
The core code is below and at both the aforementioned blog post and [this gist](https://gist.github.com/hrbrmstr/11286662). The post walks you though creating a simple interface and a future post will cover how to build a full package interface to an external library.
