diff options
| -rwxr-xr-x | src/conf_mode/dhcp_server.py | 43 |
1 files changed, 24 insertions, 19 deletions
diff --git a/src/conf_mode/dhcp_server.py b/src/conf_mode/dhcp_server.py index 0c7990105..39cc72574 100755 --- a/src/conf_mode/dhcp_server.py +++ b/src/conf_mode/dhcp_server.py @@ -139,7 +139,7 @@ shared-network {{ network.name }} { option netbios-name-servers {{ subnet.wins_server | join(', ') }}; {%- endif %} {%- if subnet.static_route %} - option rfc3442-static-route {{ subnet.static_route }}; + option rfc3442-static-route {{ subnet.static_route }}{% if subnet.rfc3442_default_router %}, {{ subnet.rfc3442_default_router }}{% endif %}; option windows-static-route {{ subnet.static_route }}; {%- endif %} {%- if subnet.ip_forwarding %} @@ -315,6 +315,26 @@ def dhcp_slice_range(exclude_list, range_list): return output +def dhcp_static_route(static_subnet, static_router): + # https://ercpe.de/blog/pushing-static-routes-with-isc-dhcp-server + # Option format is: + # <netmask>, <network-byte1>, <network-byte2>, <network-byte3>, <router-byte1>, <router-byte2>, <router-byte3> + # where bytes with the value 0 are omitted. + net = ip_network(static_subnet) + # add netmask + string = str(net.prefixlen) + ',' + # add network bytes + if net.prefixlen: + width = net.prefixlen // 8 + if net.prefixlen % 8: + width += 1 + string += ','.join(map(str,tuple(net.network_address.packed)[:width])) + ',' + + # add router bytes + string += ','.join(static_router.split('.')) + + return string + def get_config(): dhcp = default_config_data conf = Config() @@ -395,6 +415,7 @@ def get_config(): 'bootfile_server': '', 'client_prefix_length': '', 'default_router': '', + 'rfc3442_default_router': '', 'dns_server': [], 'domain_name': '', 'domain_search': [], @@ -443,6 +464,7 @@ def get_config(): # Default router IP address on the client's subnet if conf.exists('default-router'): subnet['default_router'] = conf.return_value('default-router') + subnet['rfc3442_default_router'] = dhcp_static_route("0.0.0.0/0", subnet['default_router']) # Specifies a list of Domain Name System (STD 13, RFC 1035) name servers available to # the client. Servers should be listed in order of preference. @@ -586,24 +608,7 @@ def get_config(): subnet['static_router'] = conf.return_value('static-route router') if subnet['static_router'] and subnet['static_subnet']: - # https://ercpe.de/blog/pushing-static-routes-with-isc-dhcp-server - # Option format is: - # <netmask>, <network-byte1>, <network-byte2>, <network-byte3>, <router-byte1>, <router-byte2>, <router-byte3> - # where bytes with the value 0 are omitted. - net = ip_network(subnet['static_subnet']) - # add netmask - string = str(net.prefixlen) + ',' - # add network bytes - if net.prefixlen: - width = net.prefixlen // 8 - if net.prefixlen % 8: - width += 1 - string += ','.join(map(str,tuple(net.network_address.packed)[:width])) + ',' - - # add router bytes - string += ','.join(subnet['static_router'].split('.')) - - subnet['static_route'] = string + subnet['static_route'] = dhcp_static_route(subnet['static_subnet'], subnet['static_router']) # HACKS AND TRICKS # |