用于模拟第七层DDoS攻击的一个工具：
在arch linux下无法找到对应的包，暂时只能在ubuntu下进行。
https://stormsecurity.wordpress.com/2009/03/03/application-layer-ddos-simulator/
寻找包的地址：http://archive.debian.org/debian//pool/main/libn/libnet0/
Install required packages:
sudo apt-get install build-essential
sudo apt-get install libpcap-dev
wget http://mirrors.us.kernel.org/ubuntu//pool/universe/libn/libnet0/libnet0_1.0.2a-7_amd64.deb
sudo dpkg -i libnet0_1.0.2a-7_amd64.deb
wget http://mirrors.us.kernel.org/ubuntu//pool/universe/libn/libnet0/libnet0-dev_1.0.2a-7_amd64.deb
sudo dpkg -i libnet0-dev_1.0.2a-7_amd64.deb
wget http://downloads.sourceforge.net/project/ddosim/ddosim-0.2.tar.gz
tar xfv ddosim-0.2.tar.gz
cd ddosim-0.2/
./configure
make
sudo make install