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authorChristian Poessinger <christian@poessinger.com>2022-02-20 10:40:38 +0100
committerChristian Poessinger <christian@poessinger.com>2022-02-20 18:49:55 +0100
commitb693f929b63c0c847d9a3c6ee9160845ef501be1 (patch)
tree7791c4f4c546739669ffff268490393e7ac548d5
parent3a1a7c40a13ee9f5561823a79876d88d3f5bf053 (diff)
downloadvyos-1x-b693f929b63c0c847d9a3c6ee9160845ef501be1.tar.gz
vyos-1x-b693f929b63c0c847d9a3c6ee9160845ef501be1.zip
static: T4203: obey interface dhcp default route distance
Commit 05aa22dc ("protocols: static: T3680: do not delete DHCP received routes") added a bug whenever a static route is modified - the DHCP interface will always end up with metric 210 - if there was a default route over a DHCP interface.
-rw-r--r--data/templates/frr/staticd.frr.tmpl4
-rw-r--r--interface-definitions/include/interface/dhcp-options.xml.i3
-rw-r--r--python/vyos/configdict.py54
3 files changed, 48 insertions, 13 deletions
diff --git a/data/templates/frr/staticd.frr.tmpl b/data/templates/frr/staticd.frr.tmpl
index bfe959c1d..5d833228a 100644
--- a/data/templates/frr/staticd.frr.tmpl
+++ b/data/templates/frr/staticd.frr.tmpl
@@ -17,10 +17,10 @@ vrf {{ vrf }}
{% endif %}
{# IPv4 default routes from DHCP interfaces #}
{% if dhcp is defined and dhcp is not none %}
-{% for interface in dhcp %}
+{% for interface, interface_config in dhcp.items() %}
{% set next_hop = interface | get_dhcp_router %}
{% if next_hop is defined and next_hop is not none %}
-{{ ip_prefix }} route 0.0.0.0/0 {{ next_hop }} {{ interface }} tag 210 210
+{{ ip_prefix }} route 0.0.0.0/0 {{ next_hop }} {{ interface }} tag 210 {{ interface_config.distance }}
{% endif %}
{% endfor %}
{% endif %}
diff --git a/interface-definitions/include/interface/dhcp-options.xml.i b/interface-definitions/include/interface/dhcp-options.xml.i
index b65b0802a..f62b06640 100644
--- a/interface-definitions/include/interface/dhcp-options.xml.i
+++ b/interface-definitions/include/interface/dhcp-options.xml.i
@@ -30,12 +30,13 @@
<help>Distance for the default route from DHCP server</help>
<valueHelp>
<format>u32:1-255</format>
- <description>Distance for the default route from DHCP server (default 210)</description>
+ <description>Distance for the default route from DHCP server (default: 210)</description>
</valueHelp>
<constraint>
<validator name="numeric" argument="--range 1-255"/>
</constraint>
</properties>
+ <defaultValue>210</defaultValue>
</leafNode>
<leafNode name="reject">
<properties>
diff --git a/python/vyos/configdict.py b/python/vyos/configdict.py
index efeb6dc1f..f2ec93520 100644
--- a/python/vyos/configdict.py
+++ b/python/vyos/configdict.py
@@ -319,34 +319,42 @@ def is_source_interface(conf, interface, intftype=None):
def get_dhcp_interfaces(conf, vrf=None):
""" Common helper functions to retrieve all interfaces from current CLI
sessions that have DHCP configured. """
- dhcp_interfaces = []
+ dhcp_interfaces = {}
dict = conf.get_config_dict(['interfaces'], get_first_key=True)
if not dict:
return dhcp_interfaces
def check_dhcp(config, ifname):
- out = []
+ tmp = {}
if 'address' in config and 'dhcp' in config['address']:
+ options = {}
+ if 'dhcp_options' in config and 'default_route_distance' in config['dhcp_options']:
+ options.update({'distance' : config['dhcp_options']['default_route_distance']})
if 'vrf' in config:
- if vrf is config['vrf']: out.append(ifname)
- else: out.append(ifname)
- return out
+ if vrf is config['vrf']: tmp.update({ifname : options})
+ else: tmp.update({ifname : options})
+ return tmp
for section, interface in dict.items():
- for ifname, ifconfig in interface.items():
+ for ifname in interface:
+ # we already have a dict representation of the config from get_config_dict(),
+ # but with the extended information from get_interface_dict() we also
+ # get the DHCP client default-route-distance default option if not specified.
+ ifconfig = get_interface_dict(conf, ['interfaces', section], ifname)
+
tmp = check_dhcp(ifconfig, ifname)
- dhcp_interfaces.extend(tmp)
+ dhcp_interfaces.update(tmp)
# check per VLAN interfaces
for vif, vif_config in ifconfig.get('vif', {}).items():
tmp = check_dhcp(vif_config, f'{ifname}.{vif}')
- dhcp_interfaces.extend(tmp)
+ dhcp_interfaces.update(tmp)
# check QinQ VLAN interfaces
for vif_s, vif_s_config in ifconfig.get('vif-s', {}).items():
tmp = check_dhcp(vif_s_config, f'{ifname}.{vif_s}')
- dhcp_interfaces.extend(tmp)
+ dhcp_interfaces.update(tmp)
for vif_c, vif_c_config in vif_s_config.get('vif-c', {}).items():
tmp = check_dhcp(vif_c_config, f'{ifname}.{vif_s}.{vif_c}')
- dhcp_interfaces.extend(tmp)
+ dhcp_interfaces.update(tmp)
return dhcp_interfaces
@@ -405,6 +413,12 @@ def get_interface_dict(config, base, ifname=''):
if 'deleted' not in dict:
dict = dict_merge(default_values, dict)
+ # If interface does not request an IPv4 DHCP address there is no need
+ # to keep the dhcp-options key
+ if 'address' not in dict or 'dhcp' not in dict['address']:
+ if 'dhcp_options' in dict:
+ del dict['dhcp_options']
+
# XXX: T2665: blend in proper DHCPv6-PD default values
dict = T2665_set_dhcpv6pd_defaults(dict)
@@ -475,6 +489,12 @@ def get_interface_dict(config, base, ifname=''):
# XXX: T2665: blend in proper DHCPv6-PD default values
dict['vif'][vif] = T2665_set_dhcpv6pd_defaults(dict['vif'][vif])
+ # If interface does not request an IPv4 DHCP address there is no need
+ # to keep the dhcp-options key
+ if 'address' not in dict['vif'][vif] or 'dhcp' not in dict['vif'][vif]['address']:
+ if 'dhcp_options' in dict['vif'][vif]:
+ del dict['vif'][vif]['dhcp_options']
+
# Check if we are a member of a bridge device
bridge = is_member(config, f'{ifname}.{vif}', 'bridge')
if bridge: dict['vif'][vif].update({'is_bridge_member' : bridge})
@@ -509,6 +529,13 @@ def get_interface_dict(config, base, ifname=''):
# XXX: T2665: blend in proper DHCPv6-PD default values
dict['vif_s'][vif_s] = T2665_set_dhcpv6pd_defaults(dict['vif_s'][vif_s])
+ # If interface does not request an IPv4 DHCP address there is no need
+ # to keep the dhcp-options key
+ if 'address' not in dict['vif_s'][vif_s] or 'dhcp' not in \
+ dict['vif_s'][vif_s]['address']:
+ if 'dhcp_options' in dict['vif_s'][vif_s]:
+ del dict['vif_s'][vif_s]['dhcp_options']
+
# Check if we are a member of a bridge device
bridge = is_member(config, f'{ifname}.{vif_s}', 'bridge')
if bridge: dict['vif_s'][vif_s].update({'is_bridge_member' : bridge})
@@ -543,6 +570,13 @@ def get_interface_dict(config, base, ifname=''):
dict['vif_s'][vif_s]['vif_c'][vif_c] = T2665_set_dhcpv6pd_defaults(
dict['vif_s'][vif_s]['vif_c'][vif_c])
+ # If interface does not request an IPv4 DHCP address there is no need
+ # to keep the dhcp-options key
+ if 'address' not in dict['vif_s'][vif_s]['vif_c'][vif_c] or 'dhcp' \
+ not in dict['vif_s'][vif_s]['vif_c'][vif_c]['address']:
+ if 'dhcp_options' in dict['vif_s'][vif_s]['vif_c'][vif_c]:
+ del dict['vif_s'][vif_s]['vif_c'][vif_c]['dhcp_options']
+
# Check if we are a member of a bridge device
bridge = is_member(config, f'{ifname}.{vif_s}.{vif_c}', 'bridge')
if bridge: dict['vif_s'][vif_s]['vif_c'][vif_c].update(