gnu: Add shadowsocks.

* gnu/packages/networking.scm (shadowsocks): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/networking.scm

@@ -1902,3 +1902,36 @@ eight bytes) tools
 low-level I/O programming that provides developers with a consistent
 asynchronous model using a modern C++ approach.")
     (license license:boost1.0)))
+
+(define-public shadowsocks
+  ;; There are some security fixes after the last release.
+  (let* ((commit "e332ec93e9c90f1cbee676b022bf2c5d5b7b1239")
+         (revision "0")
+         (version (git-version "2.8.2" revision commit)))
+    (package
+      (name "shadowsocks")
+      (version version)
+      (home-page "https://github.com/shadowsocks/shadowsocks")
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url home-page)
+                      (commit commit)))
+                (sha256
+                 (base32
+                  "1idd9b4f2pnhcpk1bh030hqg5zq25gkwxd53xi3c0cj242w7sp2j"))
+                (file-name (git-file-name name version))))
+      (build-system python-build-system)
+      (synopsis "Fast tunnel proxy that helps you bypass firewalls")
+      (description
+       "This package is a fast tunnel proxy that helps you bypass firewalls.
+
+Features:
+@itemize
+@item TCP & UDP support
+@item User management API
+@item TCP Fast Open
+@item Workers and graceful restart
+@item Destination IP blacklist
+@end itemize")
+      (license license:asl2.0))))