1 files changed, 132 insertions, 0 deletions
diff --git a/src/conf_mode/protocols_static.py b/src/conf_mode/protocols_static.py
new file mode 100644
index 0000000..a237321
--- /dev/null
+++ b/src/conf_mode/protocols_static.py
@@ -0,0 +1,132 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2021-2024 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
+# 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/>.
+
+from sys import exit
+from sys import argv
+
+from vyos.config import Config
+from vyos.configdict import dict_merge
+from vyos.configdict import get_dhcp_interfaces
+from vyos.configdict import get_pppoe_interfaces
+from vyos.configverify import verify_common_route_maps
+from vyos.configverify import verify_vrf
+from vyos.template import render
+from vyos.template import render_to_string
+from vyos import ConfigError
+from vyos import frr
+from vyos import airbag
+airbag.enable()
+
+config_file = '/etc/iproute2/rt_tables.d/vyos-static.conf'
+
+def get_config(config=None):
+    if config:
+        conf = config
+    else:
+        conf = Config()
+
+    vrf = None
+    if len(argv) > 1:
+        vrf = argv[1]
+
+    base_path = ['protocols', 'static']
+    # eqivalent of the C foo ? 'a' : 'b' statement
+    base = vrf and ['vrf', 'name', vrf, 'protocols', 'static'] or base_path
+    static = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True, no_tag_node_value_mangle=True)
+
+    # Assign the name of our VRF context
+    if vrf: static['vrf'] = vrf
+
+    # We also need some additional information from the config, prefix-lists
+    # and route-maps for instance. They will be used in verify().
+    #
+    # XXX: one MUST always call this without the key_mangling() option! See
+    # vyos.configverify.verify_common_route_maps() for more information.
+    tmp = conf.get_config_dict(['policy'])
+    # Merge policy dict into "regular" config dict
+    static = dict_merge(tmp, static)
+
+    # T3680 - get a list of all interfaces currently configured to use DHCP
+    tmp = get_dhcp_interfaces(conf, vrf)
+    if tmp: static.update({'dhcp' : tmp})
+    tmp = get_pppoe_interfaces(conf, vrf)
+    if tmp: static.update({'pppoe' : tmp})
+
+    return static
+
+def verify(static):
+    verify_common_route_maps(static)
+
+    for route in ['route', 'route6']:
+        # if there is no route(6) key in the dictionary we can immediately
+        # bail out early
+        if route not in static:
+            continue
+
+        # When leaking routes to other VRFs we must ensure that the destination
+        # VRF exists
+        for prefix, prefix_options in static[route].items():
+            # both the interface and next-hop CLI node can have a VRF subnode,
+            # thus we check this using a for loop
+            for type in ['interface', 'next_hop']:
+                if type in prefix_options:
+                    for interface, interface_config in prefix_options[type].items():
+                        verify_vrf(interface_config)
+
+            if {'blackhole', 'reject'} <= set(prefix_options):
+                raise ConfigError(f'Can not use both blackhole and reject for '\
+                                  'prefix "{prefix}"!')
+
+    return None
+
+def generate(static):
+    if not static:
+        return None
+
+    # Put routing table names in /etc/iproute2/rt_tables
+    render(config_file, 'iproute2/static.conf.j2', static)
+    static['new_frr_config'] = render_to_string('frr/staticd.frr.j2', static)
+    return None
+
+def apply(static):
+    static_daemon = 'staticd'
+
+    # Save original configuration prior to starting any commit actions
+    frr_cfg = frr.FRRConfig()
+    frr_cfg.load_configuration(static_daemon)
+
+    if 'vrf' in static:
+        vrf = static['vrf']
+        frr_cfg.modify_section(f'^vrf {vrf}', stop_pattern='^exit-vrf', remove_stop_mark=True)
+    else:
+        frr_cfg.modify_section(r'^ip route .*')
+        frr_cfg.modify_section(r'^ipv6 route .*')
+
+    if 'new_frr_config' in static:
+        frr_cfg.add_before(frr.default_add_before, static['new_frr_config'])
+    frr_cfg.commit_configuration(static_daemon)
+
+    return None
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        exit(1)