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-rw-r--r--lib/leap_cli/macros/stunnel.rb95
1 files changed, 95 insertions, 0 deletions
diff --git a/lib/leap_cli/macros/stunnel.rb b/lib/leap_cli/macros/stunnel.rb
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+##
+## STUNNEL
+##
+
+#
+# About stunnel
+# --------------------------
+#
+# The network looks like this:
+#
+# From the client's perspective:
+#
+# |------- stunnel client --------------| |---------- stunnel server -----------------------|
+# consumer app -> localhost:accept_port -> connect:connect_port -> ??
+#
+# From the server's perspective:
+#
+# |------- stunnel client --------------| |---------- stunnel server -----------------------|
+# ?? -> *:accept_port -> localhost:connect_port -> service
+#
+
+module LeapCli
+ module Macro
+
+ #
+ # stunnel configuration for the client side.
+ #
+ # +node_list+ is a ObjectList of nodes running stunnel servers.
+ #
+ # +port+ is the real port of the ultimate service running on the servers
+ # that the client wants to connect to.
+ #
+ # * accept_port is the port on localhost to which local clients
+ # can connect. it is auto generated serially.
+ #
+ # * connect_port is the port on the stunnel server to connect to.
+ # it is auto generated from the +port+ argument.
+ #
+ # generates an entry appropriate to be passed directly to
+ # create_resources(stunnel::service, hiera('..'), defaults)
+ #
+ # local ports are automatically generated, starting at 4000
+ # and incrementing in sorted order (by node name).
+ #
+ def stunnel_client(node_list, port, options={})
+ @next_stunnel_port ||= 4000
+ node_list = listify(node_list)
+ hostnames(node_list) # record the hosts
+ result = Config::ObjectList.new
+ node_list.each_node do |node|
+ if node.name != self.name || options[:include_self]
+ result["#{node.name}_#{port}"] = Config::Object[
+ 'accept_port', @next_stunnel_port,
+ 'connect', node.domain.internal,
+ 'connect_port', stunnel_port(port),
+ 'original_port', port
+ ]
+ @next_stunnel_port += 1
+ end
+ end
+ result
+ end
+
+ #
+ # generates a stunnel server entry.
+ #
+ # +port+ is the real port targeted service.
+ #
+ # * `accept_port` is the publicly bound port
+ # * `connect_port` is the port that the local service is running on.
+ #
+ def stunnel_server(port)
+ {
+ "accept_port" => stunnel_port(port),
+ "connect_port" => port
+ }
+ end
+
+ private
+
+ #
+ # maps a real port to a stunnel port (used as the connect_port in the client config
+ # and the accept_port in the server config)
+ #
+ def stunnel_port(port)
+ port = port.to_i
+ if port < 50000
+ return port + 10000
+ else
+ return port - 10000
+ end
+ end
+
+ end
+end \ No newline at end of file