diff options
Diffstat (limited to 'python/vyos/validate.py')
| -rw-r--r-- | python/vyos/validate.py | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/python/vyos/validate.py b/python/vyos/validate.py index 6304fa8de..9072c5817 100644 --- a/python/vyos/validate.py +++ b/python/vyos/validate.py @@ -13,10 +13,23 @@ # You should have received a copy of the GNU Lesser General Public # License along with this library. If not, see <http://www.gnu.org/licenses/>. +import json import socket import netifaces import ipaddress +from vyos.util import cmd + +# Important note when you are adding new validation functions: +# +# The Control class will analyse the signature of the function in this file +# and will build the parameters to be passed to it. +# +# The parameter names "ifname" and "self" will get the Interface name and class +# parameters with default will be left unset +# all other paramters will receive the value to check + + def is_ip(addr): """ Check addr if it is an IPv4 or IPv6 address @@ -208,10 +221,21 @@ def assert_positive(n, smaller=0): raise ValueError(f'{n} is smaller than {smaller}') -def assert_mtu(mtu, min=68, max=9000): +def assert_mtu(mtu, ifname): assert_number(mtu) - if int(mtu) < min or int(mtu) > max: - raise ValueError(f'Invalid MTU size: "{mtu}"') + + out = cmd(f'ip -j -d link show dev {ifname}') + # [{"ifindex":2,"ifname":"eth0","flags":["BROADCAST","MULTICAST","UP","LOWER_UP"],"mtu":1500,"qdisc":"pfifo_fast","operstate":"UP","linkmode":"DEFAULT","group":"default","txqlen":1000,"link_type":"ether","address":"08:00:27:d9:5b:04","broadcast":"ff:ff:ff:ff:ff:ff","promiscuity":0,"min_mtu":46,"max_mtu":16110,"inet6_addr_gen_mode":"none","num_tx_queues":1,"num_rx_queues":1,"gso_max_size":65536,"gso_max_segs":65535}] + parsed = json.loads(out)[0] + min_mtu = int(parsed.get('min_mtu', '0')) + # cur_mtu = parsed.get('mtu',0), + max_mtu = int(parsed.get('max_mtu', '0')) + cur_mtu = int(mtu) + + if (min_mtu and cur_mtu < min_mtu) or cur_mtu < 68: + raise ValueError(f'MTU is too small for interface "{ifname}": {mtu} < {min_mtu}') + if (max_mtu and cur_mtu > max_mtu) or cur_mtu > 65536: + raise ValueError(f'MTU is too small for interface "{ifname}": {mtu} > {max_mtu}') def assert_mac(m): @@ -241,6 +265,7 @@ def assert_mac(m): if octets[:5] == (0, 0, 94, 0, 1): raise ValueError(f'{m} is a VRRP MAC address') + def is_member(conf, interface, intftype=None): """ Checks if passed interface is member of other interface of specified type. |