diff options
| -rwxr-xr-x | src/conf_mode/nat_cgnat.py | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/conf_mode/nat_cgnat.py b/src/conf_mode/nat_cgnat.py index cb336a35c..34ec64fce 100755 --- a/src/conf_mode/nat_cgnat.py +++ b/src/conf_mode/nat_cgnat.py @@ -23,6 +23,7 @@ from sys import exit from logging.handlers import SysLogHandler from vyos.config import Config +from vyos.configdict import is_node_changed from vyos.template import render from vyos.utils.process import cmd from vyos.utils.process import run @@ -118,6 +119,41 @@ class IPOperations: + [self.ip_network.broadcast_address] ] + def get_prefix_by_ip_range(self): + """Return the common prefix for the address range + + Example: + % ip = IPOperations('100.64.0.1-100.64.0.5') + % ip.get_prefix_by_ip_range() + 100.64.0.0/29 + """ + if '-' in self.ip_prefix: + ip_start, ip_end = self.ip_prefix.split('-') + start_ip = ipaddress.IPv4Address(ip_start.strip()) + end_ip = ipaddress.IPv4Address(ip_end.strip()) + + start_int = int(start_ip) + end_int = int(end_ip) + + # XOR to find differing bits + xor = start_int ^ end_int + + # Count the number of leading zeros in the XOR result to find the prefix length + prefix_length = 32 - xor.bit_length() + + # Calculate the network address + network_int = start_int & (0xFFFFFFFF << (32 - prefix_length)) + network_address = ipaddress.IPv4Address(network_int) + + return f"{network_address}/{prefix_length}" + return self.ip_prefix + + +def _delete_conntrack_entries(source_prefixes: list) -> None: + """Delete all conntrack entries for the list of prefixes""" + for source_prefix in source_prefixes: + run(f'conntrack -D -s {source_prefix}') + def generate_port_rules( external_hosts: list, @@ -188,6 +224,9 @@ def get_config(config=None): with_recursive_defaults=True, ) + if conf.exists(base) and is_node_changed(conf, base + ['pool']): + config.update({'delete_conntrack_entries': {}}) + return config @@ -386,6 +425,18 @@ def apply(config): # Log error message logger.error(f"Error processing line '{allocation}': {e}") + # Delete conntrack entries + if 'delete_conntrack_entries' in config: + internal_pool_prefix_list = [] + for rule, rule_config in config['rule'].items(): + internal_pool = rule_config['source']['pool'] + internal_ip_ranges: list = config['pool']['internal'][internal_pool]['range'] + for internal_range in internal_ip_ranges: + ip_prefix = IPOperations(internal_range).get_prefix_by_ip_range() + internal_pool_prefix_list.append(ip_prefix) + # Deleta required sources for conntrack + _delete_conntrack_entries(internal_pool_prefix_list) + if __name__ == '__main__': try: |