Add script for generating martians table from IANA IP IPv[46] special registry

utils/openbsd/pf-martians/iana-ip-special-registry-parser.py

@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+import csv
+import re
+import sys
+
+REGEX_FOOTNOTES = re.compile(r" \[\d+\]")
+REGEX_WHITESPACES = re.compile(r"\s+")
+
+def parse_iana_csv(csvfile):
+	reader = csv.DictReader(csvfile)
+	for row in reader:
+		fmt = ""
+		reachable = row["Globally Reachable"]
+		if reachable == "":
+			continue
+		if "False" in reachable:
+			fmt = "{}"
+		elif "True" in reachable:
+			fmt = "!{}"
+		elif "N/A" in reachable:
+			fmt = "#{}"
+		else:
+			fmt = "#[" + reachable + "]: {}"
+		blocks = row["Address Block"]
+		blocks = REGEX_FOOTNOTES.sub("", blocks)
+		blocks = REGEX_WHITESPACES.sub("", blocks)
+		for block in blocks.split(","):
+			print(fmt.format(block))
+
+if __name__ == "__main__":
+	def usage():
+		print("Usage: {}".format(sys.argv[1]), file=sys.stderr)
+		sys.exit(1)
+
+	if len(sys.argv) != 1:
+		usage()
+
+	parse_iana_csv(sys.stdin)