From c8f9acf5d91827b0d1266d3061a5e15a82628323 Mon Sep 17 00:00:00 2001
From: Viacheslav Hletenko <v.gletenko@vyos.io>
Date: Thu, 25 Apr 2024 09:47:24 +0000
Subject: T6263: Groups 224.0.0.0/24 are reserved and cannot be joined
The join addresses within the multicast group 224.0.0.0/24 are
reserved and cannot be joined
FRR
```
r4(config)# interface eth2
r4(config-if)# ip igmp join 224.0.0.0 224.0.0.10
% Configuration failed.
Error type: validation
Error description: Groups within 224.0.0.0/24 are reserved and cannot be joined
r4(config-if)#
```
Add verify check
---
src/conf_mode/protocols_pim.py | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
(limited to 'src/conf_mode')
diff --git a/src/conf_mode/protocols_pim.py b/src/conf_mode/protocols_pim.py
index 09c3be8df..d450d11ca 100755
--- a/src/conf_mode/protocols_pim.py
+++ b/src/conf_mode/protocols_pim.py
@@ -1,6 +1,6 @@
#!/usr/bin/env python3
#
-# Copyright (C) 2020-2023 VyOS maintainers and contributors
+# Copyright (C) 2020-2024 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
@@ -16,6 +16,7 @@
import os
+from ipaddress import IPv4Address
from ipaddress import IPv4Network
from signal import SIGTERM
from sys import exit
@@ -32,6 +33,9 @@ from vyos import frr
from vyos import airbag
airbag.enable()
+RESERVED_MC_NET = '224.0.0.0/24'
+
+
def get_config(config=None):
if config:
conf = config
@@ -92,9 +96,15 @@ def verify(pim):
if 'interface' not in pim:
raise ConfigError('PIM require defined interfaces!')
- for interface in pim['interface']:
+ for interface, interface_config in pim['interface'].items():
verify_interface_exists(interface)
+ # Check join group in reserved net
+ if 'igmp' in interface_config and 'join' in interface_config['igmp']:
+ for join_addr in interface_config['igmp']['join']:
+ if IPv4Address(join_addr) in IPv4Network(RESERVED_MC_NET):
+ raise ConfigError(f'Groups within {RESERVED_MC_NET} are reserved and cannot be joined!')
+
if 'rp' in pim:
if 'address' not in pim['rp']:
raise ConfigError('PIM rendezvous point needs to be defined!')
--
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