This library provides functions that have similar behavior as the unix command-line utility ping. In particular, both emit ICMP echo requests and wait for responses. This library uses a haskell implementation of ICMP rather than invoking `binping`. This avoids the costly process of starting a child process. Additionally, there are greater opportunities for reusing sockets. The cost of this is that the user must ensure that one of these is true: The kernel parameter net.ipv4.ping_group_range has been configured to allow pings to all IP addresses. (preferred solution) The process is running with the the CAP_NET_RAW capability. The process is running as root. (worst solution)