def vpn(base, prefer, approx, includes=None, excludes=None):
"""
Generate networks for VPN route table.
"""
def load_networks(path_arr):
if path_arr:
ret = IPSet()
for path in path_arr.split(','):
ret |= networks_from_source(open(path, 'rb').read())
return ret
must_include = load_networks(includes)
must_exclude = private_networks()
if excludes:
must_exclude |= load_networks(excludes)
base_networks = china_networks() if base == 'china' else foreign_networks()
networks = approx_networks(
base_networks,
prefer == 'include',
approx,
must_include,
must_exclude
)
print '\n'.join(map(str, networks.iter_cidrs()))
def china():
"""Query about the china networks."""
networks = china_networks()
print '\n'.join(map(str, networks.iter_cidrs()))
def foreign_networks():
return negate_networks(china_networks() | private_networks())
