From 5062f5d313548d6ebb9c07fee6b6d6be25b8f8f0 Mon Sep 17 00:00:00 2001 From: Christian Breunig Date: Sun, 31 Dec 2023 11:21:14 +0100 Subject: configverify: T5880: raise exception if interfaces sourced form dynamic interfaces Interfaces matching the following regex (ppp|pppoe|sstpc|l2tp|ipoe)[0-9]+ can not be used as source-interface for e.g. a tunnel. The main reason is that these are dynamic interfaces which come and go from a kernel point of view, thus it's not possible to bind an interface to them. --- python/vyos/configverify.py | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) (limited to 'python') diff --git a/python/vyos/configverify.py b/python/vyos/configverify.py index 27055c863..85423142d 100644 --- a/python/vyos/configverify.py +++ b/python/vyos/configverify.py @@ -281,16 +281,22 @@ def verify_source_interface(config): perform recurring validation of the existence of a source-interface required by e.g. peth/MACvlan, MACsec ... """ + import re from netifaces import interfaces - if 'source_interface' not in config: - raise ConfigError('Physical source-interface required for ' - 'interface "{ifname}"'.format(**config)) - if config['source_interface'] not in interfaces(): - raise ConfigError('Specified source-interface {source_interface} does ' - 'not exist'.format(**config)) + ifname = config['ifname'] + if 'source_interface' not in config: + raise ConfigError(f'Physical source-interface required for "{ifname}"!') src_ifname = config['source_interface'] + # We do not allow sourcing other interfaces (e.g. tunnel) from dynamic interfaces + tmp = re.compile(r'(ppp|pppoe|sstpc|l2tp|ipoe)[0-9]+') + if tmp.match(src_ifname): + raise ConfigError(f'Can not source "{ifname}" from dynamic interface "{src_ifname}"!') + + if src_ifname not in interfaces(): + raise ConfigError(f'Specified source-interface {src_ifname} does not exist') + if 'source_interface_is_bridge_member' in config: bridge_name = next(iter(config['source_interface_is_bridge_member'])) raise ConfigError(f'Invalid source-interface "{src_ifname}". Interface ' @@ -303,7 +309,6 @@ def verify_source_interface(config): if 'is_source_interface' in config: tmp = config['is_source_interface'] - src_ifname = config['source_interface'] raise ConfigError(f'Can not use source-interface "{src_ifname}", it already ' \ f'belongs to interface "{tmp}"!') -- cgit v1.2.3