/usr/lib/libns3.22-point-to-point.so is in libns3-dev 3.22+dfsg-2build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libns3.22-point-to-point.so.0.0.0
/usr/lib/libns3.22-point-to-point.so.0.0.0