IPFIX input: add support for reading IPFIX Files, documentation

src/plugins/input/ipfix/README.rst

@@ -1,23 +1,30 @@
-IPFIX file (input plugin)
+IPFIX File (input plugin)
 =========================
 
-TODO
+The plugin reads flow data from one or more files in IPFIX File format. It is possible to
+use it to load flow records previously stored using IPFIX output plugin.
+
+Unlike UDP and TCP input plugins which infinitely waits for data from NetFlow/IPFIX
+exporters, the plugin will terminate the collector after all files are processed.
 
 Example configuration
 ---------------------
 
 .. code-block:: xml
 
     <input>
-        <name>IPFIX input</name>
+        <name>IPFIX File</name>
         <plugin>ipfix</plugin>
         <params>
-            <dirPath>4739</dirPath>
-            <fileName></fileName>
+            <path>/tmp/flow/file.ipfix</path>
         </params>
     </input>
 
 Parameters
 ----------
 
-TODO
+:``path``:
+    Path to file(s) in IPFIX File format. It is possible to use asterisk instead of
+    a filename/directory, tilde character (i.e. "~") instead of the home directory of
+    the user, and brace expressions (i.e. "/tmp/{source1,source2}/file.ipfix").
+    Directories and non-IPFIX Files that match the file pattern are skipped/ignored.

src/plugins/input/ipfix/config.h

@@ -48,8 +48,8 @@
 
 /** Configuration of a instance of the IPFIX plugin                                              */
 struct ipfix_config {
-    /** Local port                                                                               */
-    const char *path;
+    /** File pattern                                                                             */
+    char *path;
 };
 
 /**