1 files changed, 35 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/servers/ucarp/default.nix b/nixpkgs/pkgs/servers/ucarp/default.nix
new file mode 100644
index 000000000000..90cbc562d382
--- /dev/null
+++ b/nixpkgs/pkgs/servers/ucarp/default.nix
@@ -0,0 +1,35 @@
+{ stdenv, lib, fetchurl, libpcap }:
+
+stdenv.mkDerivation rec {
+  pname = "ucarp";
+  version = "1.5.2";
+
+  src = fetchurl {
+    url = "https://download.pureftpd.org/pub/ucarp/ucarp-${version}.tar.bz2";
+    sha256 = "0qidz5sr55nxlmnl8kcbjsrff2j97b44h9l1dmhvvjl46iji7q7j";
+  };
+
+  buildInputs = [ libpcap ];
+
+  # Workaround build failure on -fno-common toolchains like upstream
+  # gcc-10. Otherwise build fails as:
+  #   ld: daemonize.o:/build/ucarp-1.5.2/src/ip_carp.h:73: multiple definition of
+  #     `__packed'; ucarp.o:/build/ucarp-1.5.2/src/ip_carp.h:73: first defined here
+  env.NIX_CFLAGS_COMPILE = "-fcommon";
+
+  meta = with lib; {
+    description = "Userspace implementation of CARP";
+    longDescription = ''
+      UCARP allows a couple of hosts to share common virtual IP addresses in
+      order to provide automatic failover. It is a portable userland
+      implementation of the secure and patent-free Common Address Redundancy
+      Protocol (CARP, OpenBSD's alternative to the patents-bloated VRRP).
+
+      Warning: This package has not received any upstream updates for a long
+      time and can be considered as unmaintained.
+    '';
+    license = with licenses; [ isc bsdOriginal bsd2 gpl2Plus ];
+    maintainers = with maintainers; [ oxzi ];
+    mainProgram = "ucarp";
+  };
+}