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authorChristian Poessinger <christian@poessinger.com>2020-05-16 17:21:21 +0200
committerChristian Poessinger <christian@poessinger.com>2020-05-16 18:25:58 +0200
commit2a0d1e77e650bd3e8cdff29ac62a3b23c41c85af (patch)
tree4977831bbf89f0ddd8edde1d08e05c68ed1be596 /src
parent6f349ee3b4d3da731ca22a70db6650848a0c28d9 (diff)
downloadvyos-1x-2a0d1e77e650bd3e8cdff29ac62a3b23c41c85af.tar.gz
vyos-1x-2a0d1e77e650bd3e8cdff29ac62a3b23c41c85af.zip
nat: T2198: add common ip-protocol validator
It allows IP protocol numbers 0-255, protocol names e.g. tcp, ip, ipv6 and the negated form with a leading "!".
Diffstat (limited to 'src')
-rwxr-xr-xsrc/validators/ip-protocol41
1 files changed, 41 insertions, 0 deletions
diff --git a/src/validators/ip-protocol b/src/validators/ip-protocol
new file mode 100755
index 000000000..078f8e319
--- /dev/null
+++ b/src/validators/ip-protocol
@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2020 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+import re
+from sys import argv,exit
+
+if __name__ == '__main__':
+ if len(argv) != 2:
+ exit(1)
+
+ input = argv[1]
+ try:
+ # IP protocol can be in the range 0 - 255, thus the range must end with 256
+ if int(input) in range(0, 256):
+ exit(0)
+ except ValueError:
+ pass
+
+ pattern = "!?\\b(all|ip|hopopt|icmp|igmp|ggp|ipencap|st|tcp|egp|igp|pup|udp|" \
+ "tcp_udp|hmp|xns-idp|rdp|iso-tp4|dccp|xtp|ddp|idpr-cmtp|ipv6|" \
+ "ipv6-route|ipv6-frag|idrp|rsvp|gre|esp|ah|skip|ipv6-icmp|" \
+ "ipv6-nonxt|ipv6-opts|rspf|vmtp|eigrp|ospf|ax.25|ipip|etherip|" \
+ "encap|99|pim|ipcomp|vrrp|l2tp|isis|sctp|fc|mobility-header|" \
+ "udplite|mpls-in-ip|manet|hip|shim6|wesp|rohc)\\b"
+ if re.match(pattern, input):
+ exit(0)
+
+ exit(1)