contrib: Add example spec file for Fedora

...with SELinux package, too. Tested on Fedora 35, but it should
work on pretty much any version.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

contrib/fedora/passt.spec

@@ -0,0 +1,95 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+#
+# PASST - Plug A Simple Socket Transport
+#  for qemu/UNIX domain socket mode
+#
+# PASTA - Pack A Subtle Tap Abstraction
+#  for network namespace/tap device mode
+#
+# contrib/fedora/passt.spec - Example spec file for fedora
+#
+# Copyright (c) 2022 Red Hat GmbH
+# Author: Stefano Brivio <sbrivio@redhat.com>
+
+Name:		passt
+Version:	0+git-8fd20ad99d24
+Release:	0
+Summary:	User-mode networking daemons for virtual machines and namespaces
+License:	AGPLv3+ and BSD
+URL:		https://passt.top/
+Source:		https://passt.top/passt/snapshot/passt-8fd20ad99d24a517fa1771e1863f51a32d2fe8a4.tar.xz
+
+BuildRequires:	gcc, make, checkpolicy, selinux-policy-devel
+
+%description
+passt implements a translation layer between a Layer-2 network interface and
+native Layer-4 sockets (TCP, UDP, ICMP/ICMPv6 echo) on a host. It doesn't
+require any capabilities or privileges, and it can be used as a simple
+replacement for Slirp.
+
+pasta (same binary as passt, different command) offers equivalent functionality,
+for network namespaces: traffic is forwarded using a tap interface inside the
+namespace, without the need to create further interfaces on the host, hence not
+requiring any capabilities or privileges.
+
+%package    selinux
+Summary:    SELinux support for passt and pasta
+Requires:   %{name} = %{version}
+Requires(post): policycoreutils, %{name}
+Requires(preun): policycoreutils, %{name}
+
+%description selinux
+This package adds SELinux enforcement to passt(1) and pasta(1).
+
+%prep
+%setup -q
+
+%build
+export CFLAGS="%{optflags}"
+%make_build
+
+%install
+%make_install DESTDIR=%{buildroot} prefix=%{_prefix}
+%ifarch x86_64
+ln -sr %{buildroot}%{_mandir}/man1/passt.1 %{buildroot}%{_mandir}/man1/passt.avx2.1
+ln -sr %{buildroot}%{_mandir}/man1/pasta.1 %{buildroot}%{_mandir}/man1/pasta.avx2.1
+%endif
+
+pushd contrib/selinux
+make -f %{_datadir}/selinux/devel/Makefile
+install -p -m 644 -D passt.pp %{buildroot}%{_datadir}/selinux/packages/%{name}/passt.pp
+install -p -m 644 -D pasta.pp %{buildroot}%{_datadir}/selinux/packages/%{name}/pasta.pp
+popd
+
+%post selinux
+semodule -i %{_datadir}/selinux/packages/%{name}/passt.pp 2>/dev/null || :
+semodule -i %{_datadir}/selinux/packages/%{name}/pasta.pp 2>/dev/null || :
+
+%preun selinux
+semodule -r passt 2>/dev/null || :
+semodule -r pasta 2>/dev/null || :
+
+%files
+%license LICENSES/{AGPL-3.0-or-later.txt,BSD-3-Clause.txt}
+%doc README.md
+%{_bindir}/passt
+%{_bindir}/pasta
+%{_bindir}/qrap
+%{_mandir}/man1/passt.1.*
+%{_mandir}/man1/pasta.1.*
+%{_mandir}/man1/qrap.1.*
+%ifarch x86_64
+%{_bindir}/passt.avx2
+%{_mandir}/man1/passt.avx2.1.*
+%{_bindir}/pasta.avx2
+%{_mandir}/man1/pasta.avx2.1.*
+%endif
+
+%files selinux
+%doc README.md
+%{_datadir}/selinux/packages/%{name}/passt.pp
+%{_datadir}/selinux/packages/%{name}/pasta.pp
+
+%changelog
+* Mon Mar 28 2022 Stefano Brivio <sbrivio@redhat.com> 0+git-8fd20ad99d24-0
+- Pro forma: example