in_tcp/in_udp: Add source_address_key parameter

lib/fluent/plugin/in_tcp.rb

@@ -33,6 +33,8 @@ class TcpInput < Input
     config_param :source_host_key, :string, default: nil, deprecated: "use source_hostname_key instead."
     desc "The field name of the client's hostname."
     config_param :source_hostname_key, :string, default: nil
+    desc "The field name of the client's address."
+    config_param :source_address_key, :string, default: nil
 
     config_param :blocking_timeout, :time, default: 0.5
 
@@ -76,6 +78,7 @@ def start
               tag = extract_tag_from_record(record)
               tag ||= @tag
               time ||= extract_time_from_record(record) || Fluent::EventTime.now
+              record[@source_address_key] = conn.remote_addr if @source_address_key
               record[@source_hostname_key] = conn.remote_host if @source_hostname_key
               router.emit(tag, time, record)
             end

lib/fluent/plugin/in_udp.rb

@@ -33,6 +33,8 @@ class UdpInput < Input
     config_param :source_host_key, :string, default: nil, deprecated: "use source_hostname_key instead."
     desc "The field name of the client's hostname."
     config_param :source_hostname_key, :string, default: nil
+    desc "The field name of the client's address."
+    config_param :source_address_key, :string, default: nil
 
     desc "Deprecated parameter. Use message_length_limit instead"
     config_param :body_size_limit, :size, default: nil, deprecated: "use message_length_limit instead."
@@ -79,6 +81,7 @@ def start
             tag = extract_tag_from_record(record)
             tag ||= @tag
             time ||= extract_time_from_record(record) || Fluent::EventTime.now
+            record[@source_address_key] = sock.remote_addr if @source_address_key
             record[@source_hostname_key] = sock.remote_host if @source_hostname_key
             router.emit(tag, time, record)
           end

test/plugin/test_in_tcp.rb

@@ -142,4 +142,24 @@ def create_tcp_socket(host, port, &block)
     assert event[1].is_a?(Fluent::EventTime)
     assert_equal hostname, event[2]['host']
   end
+
+  test 'source_address_key' do
+    d = create_driver(BASE_CONFIG + %!
+      format none
+      source_address_key addr
+    !)
+    address = nil
+    d.run(expect_records: 1) do
+      create_tcp_socket('127.0.0.1', PORT) do |sock|
+        address = sock.peeraddr[3]
+        sock.send("test\n", 0)
+      end
+    end
+
+    assert_equal 1, d.events.size
+    event = d.events[0]
+    assert_equal "tcp", event[0]
+    assert event[1].is_a?(Fluent::EventTime)
+    assert_equal address, event[2]['addr']
+  end
 end

test/plugin/test_in_udp.rb

@@ -201,6 +201,26 @@ def create_udp_socket(host, port)
     assert_equal hostname, d.events[0][2]['host']
   end
 
+  test 'source_address_key' do
+    d = create_driver(BASE_CONFIG + %!
+      format none
+      source_address_key addr
+    !)
+    address = nil
+    d.run(expect_records: 1) do
+      create_udp_socket('127.0.0.1', PORT) do |u|
+        u.send("test", 0)
+        address = u.peeraddr[3]
+      end
+    end
+
+    expected = {'message' => 'test'}
+    assert_equal 1, d.events.size
+    assert_equal "udp", d.events[0][0]
+    assert d.events[0][1].is_a?(Fluent::EventTime)
+    assert_equal address, d.events[0][2]['addr']
+  end
+
   test 'receive_buffer_size' do
     # doesn't check exact value because it depends on platform and condition