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README

/*
 * Copyright (c) 2014-2020 by Farsight Security, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

This is a pure C99 program that accesses passive DNS database systems such as:
	* the DNSDB API server at Farsight Security
	* the CIRCL pDNS server at Computer Incident Response Center (LU)

An API key is required for operation. The command syntax was inspired by a
python script called dnsdb_query, but significant departure has occured,
largely inspired by a modern understanding of "time fencing" and a desire for
new features such as CSV output and JSON reprocessing.

Dependencies:
	jansson (2.5 or later)
	libcurl (7.28 or later)
	modern compiler (clang or GCC)

On Linux (Debian 8):
	apt-get install libcurl4-openssl-dev
	apt-get install libjansson-dev

On Linux (CentOS 6):
	# Based on PHP instructions for installing libcurl...
	wget http://curl.haxx.se/download/curl-7.28.1.tar.gz
	tar xvzf curl-7.28.1.tar.gz
	cd curl-7.28.1/
	./configure --with-libssh2 --enable-ares=/usr/local/ --enable-ipv6
	make
	make install

	# lib jansson
	wget http://www.digip.org/jansson/releases/jansson-2.5.tar.gz
	tar -xpzf jansson-2.5.tar.gz
	cd jansson-2.5
	./configure
	make
	make install

	echo /usr/local/lib >> /etc/ld.so.conf.d/local.conf
	ldconfig

On FreeBSD 10:
	pkg install curl jansson

On OSX:
	brew install jansson

Getting Started
	Add the API key to ~/.dnsdb-query.conf in the below given format,
	APIKEY="YOURAPIKEYHERE"

	If you don't have an API key, you may qualify for a free one:
	https://www.farsightsecurity.com/dnsdb-community-edition/

About

DNSDB API Client, C Version

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