Add a helper module for fuzzing CLI parsers

confutils/cli_parsing_fuzzer.nim

@@ -0,0 +1,15 @@
+import
+  strutils,
+  stew/byteutils, testutils/fuzzing,
+  ../confutils
+
+template fuzzCliParsing*(Conf: type) =
+  test:
+    block:
+      try:
+        let cfg = Conf.load(cmdLine = split(fromBytes(string, payload)),
+                            printUsage = false,
+                            quitOnFailure = false)
+      except ConfigurationError as err:
+        discard
+

confutils/std/net.nim

@@ -2,6 +2,8 @@ import std/parseutils
 import stew/shims/net as stewNet
 export stewNet
 
+export ValidIpAddress
+
 func parseCmdArg*(T: type ValidIpAddress, s: TaintedString): T =
   ValidIpAddress.init(string s)