Merge branch 'tcp2' into 'master'

Refaktorizace vstupního TCP pluginu a podpora LZ4

See merge request monitoring/ipfixcol2!12

Author: sedmicha

src/plugins/input/tcp/CMakeLists.txt

@@ -1,8 +1,18 @@
 # Create a linkable module
 add_library(tcp-input MODULE
-    tcp.c
-    config.c
-    config.h
+    src/IpAddress.cpp
+    src/Config.cpp
+    src/ByteVector.cpp
+    src/DecodeBuffer.cpp
+    src/Connection.cpp
+    src/Epoll.cpp
+    src/ClientManager.cpp
+    src/IpfixDecoder.cpp
+    src/Lz4Decoder.cpp
+    src/DecoderFactory.cpp
+    src/Acceptor.cpp
+    src/Plugin.cpp
+    src/IpxPlugin.cpp
 )
 
 if (CMAKE_HOST_SYSTEM_NAME STREQUAL "FreeBSD" OR CMAKE_HOST_SYSTEM_NAME STREQUAL "OpenBSD")

src/plugins/input/tcp/README.rst

@@ -9,6 +9,9 @@ Unlike UDP, TCP is reliable transport protocol that allows exporters to detect c
 disconnection of the collector. Therefore, the issues with templates retransmission and
 initial period of inability to interpret flow records does not apply here.
 
+Received IPFIX messages may be compressed using LZ4 stream compression. The compression is
+enabled on the exporter and the plugin detects it automatically.
+
 Example configuration
 ---------------------
 
@@ -35,3 +38,8 @@ Mandatory parameters:
     is left empty, the plugin binds to all available network interfaces. The element can occur
     multiple times (one IP address per occurrence) to manually select multiple interfaces.
     [default: empty]
+
+Notes
+-----
+The LZ4 compression uses special format that compatible with
+`ipfixproble <https://github.com/CESNET/ipfixprobe>`.