The license of ocserv is GPLv2+. See COPYING for the license terms.

Some individual code may be covered under other (compatible with
GPLv2) licenses. For the CCAN components see src/ccan/licenses/
In gnulib (see gl/) only LGPLv2 components are used, and libopts
is used under the simplified BSD license (libopts/COPYING.mbsd).