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raise if incoming ports are used multiple times

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egarette@silique.fr 2023-02-15 17:57:25 +01:00
parent 0305290883
commit 4fb6cd810b
1 changed files with 18 additions and 5 deletions
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23
seed/host-systemd-machined/templates/risottofirewall.service
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@ -1,3 +1,11 @@
%def %%get_protocol_port(%%port)
%if ':' in %%port
%set %%protocol, %%port = %%port.split(':')
%else
%set %%protocol = 'tcp'
%end if
%return %%protocol, %%port
%end def
[Unit]
Description=Firewall for Risotto
After=network.target
@ -6,22 +14,27 @@ After=network.target
Type=oneshot
RemainAfterExit=yes
%set %%has_rules = False
%set %%incoming_ports = {'tcp': {}, 'udp': {}}
%for %%dns in %%machined.machines
%set %%machine = %%normalize_family(%%dns)
%set %%outgoing = %%machined['machine_' + %%machine]['outgoing_ports_' + %%machine]
%if %%outgoing
%set %%ip = %%machined['machine_' + %%machine]['ip_' + %%machine]
%for %%port in %%outgoing
%if ':' in %%port
%set %%protocol, %%port = %%port.split(':')
%else
%set %%protocol = 'tcp'
%end if
%set %%protocol, %%port = %%get_protocol_port(%%port)
ExecStart=/sbin/iptables -t nat -A POSTROUTING -s %%ip -p %%protocol -m %%protocol --dport %%port -o %%output_interface -j MASQUERADE
ExecStop=-/sbin/iptables -t nat -D POSTROUTING -s %%ip -p %%protocol -m %%protocol --dport %%port -o %%output_interface -j MASQUERADE
%set %%has_rules = False
%end for
%end if
%set %%incoming = %%machined['machine_' + %%machine]['incoming_ports_' + %%machine]
%for %%port in %%incoming
%set %%protocol, %%port = %%get_protocol_port(%%port)
%if %%port in %%incoming_ports[%%protocol]
%raise Exception('the port "' + %%port + '" cannot be deployed for multiple machines: "' + %%dns + '" and "' + %%incoming_ports[%%protocol][%%port] + '"')
%end if
%set %%incoming_ports[%%protocol][%%port] = %%dns
%end for
%end for
%if not %%has_rules
ExecStart=/usr/bin/echo "No rule"