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libs/s2s: switch to static list of wireguard peers

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This commit is contained in:
Franzi 2023-09-09 14:11:39 +02:00
parent 5db3856218
commit 99e261fe24
Signed by: kunsi
GPG key ID: 12E3D2136B818350
1 changed files with 18 additions and 7 deletions
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25
libs/s2s.py
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@ -4,18 +4,29 @@ AS_NUMBERS = {
# 4290xxxxxx
'home': 4290000138,
'htz-cloud': 4290000137,
'ionos': 4290000002,
'ovh': 4290000001,
}
WG_AUTOGEN_NODES = [
# only ever append to this list. If a node vanishes, set its name to
# `None`. You may remove nodes from the end of this, though it's not
# recommended to do so.
None, # fkusei-locutus never used this
'home.router',
'htz-cloud.wireguard',
'icinga2',
'ovh.icinga2',
'ovh.wireguard',
]
def get_subnet_for_connection(repo, peer_a, peer_b):
# XXX this assumes there are never more than 128 nodes which match that expression
nodes = sorted({node.name for node in repo.nodes if node.has_bundle('wireguard')})
assert peer_a in WG_AUTOGEN_NODES
assert peer_b in WG_AUTOGEN_NODES
assert peer_a in nodes
assert peer_b in nodes
pos_peer_a = nodes.index(peer_a)
pos_peer_b = nodes.index(peer_b)
pos_peer_a = WG_AUTOGEN_NODES.index(peer_a)
pos_peer_b = WG_AUTOGEN_NODES.index(peer_b)
vpn_subnet = list(IPv4Network('169.254.0.0/16').subnets(new_prefix=24))[pos_peer_a]
return list(IPv4Network(vpn_subnet).subnets(new_prefix=31))[pos_peer_b]