About JICMP

JICMP is a small library to allow the use of IPv4 ICMP (raw) packets in Java.

Build from source

Requirements

• git

• automake

• autoconf

• libtool

• Java JDK 1.8+

The repository has a git submodule which contains Macros required to compile from source code.

Clone the respository on local disk

git clone https://github.com/OpenNMS/jicmp.git

Switch into source code repository

cd jicmp

Initialize and update the git submodule.

git submodule update --init --recursive

Update generated configuration files with

autoreconf -fvi

Generate make files using /usr/local/lib as install path and compile JICMP

./configure
make

Tip	If you want to change the install path the ./configure --prefix=/your/custom/path can be used.

Install the library on your system, root permissions may required when working as non-root user.

sudo make install

Using JICMP as non-root

Mac OS X supports non-root ICMP through the SOCK_DGRAM interface, which JICMP uses by default.

Linux supports this as well, but you additionally need to set a sysctl OID to allow ping for non-root users.

You can set this temporarily by running:

sysctl -w net.ipv4.ping_group_range="0 429496729"

1. or by creating a sysctl configuration file in /etc:

echo "net.ipv4.ping_group_range=0 429496729" > /etc/sysctl.d/03-non-root-icmp.conf