From 3f9f881fafa3994a8a0dc3b738eca077c4f4d054 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Thu, 20 Aug 2020 23:09:01 +0200
Subject: add role wireguard p2p

---
 roles/wireguard/p2p/tasks/main.yml                 | 20 +++++++++++
 .../p2p/tasks/systemd-iptables.service.j2          | 42 ++++++++++++++++++++++
 2 files changed, 62 insertions(+)
 create mode 100644 roles/wireguard/p2p/tasks/main.yml
 create mode 100644 roles/wireguard/p2p/tasks/systemd-iptables.service.j2

(limited to 'roles/wireguard/p2p/tasks')

diff --git a/roles/wireguard/p2p/tasks/main.yml b/roles/wireguard/p2p/tasks/main.yml
new file mode 100644
index 00000000..78cfaf43
--- /dev/null
+++ b/roles/wireguard/p2p/tasks/main.yml
@@ -0,0 +1,20 @@
+---
+- name: install wireguard interfaces (netdev)
+  template:
+    src: systemd.netdev.j2
+    dest: "/etc/systemd/network/{{ wireguard_p2p_interface.name }}.netdev"
+    mode: 0640
+    group: systemd-network
+  notify: restart systemd-networkd
+
+- name: install wireguard interfaces (network)
+  template:
+    src: systemd.network.j2
+    dest: "/etc/systemd/network/{{ wireguard_p2p_interface.name }}.network"
+  notify: restart systemd-networkd
+
+- name: enable systemd-networkd
+  systemd:
+    name: systemd-networkd
+    enabled: yes
+    state: started
diff --git a/roles/wireguard/p2p/tasks/systemd-iptables.service.j2 b/roles/wireguard/p2p/tasks/systemd-iptables.service.j2
new file mode 100644
index 00000000..11cf4b8a
--- /dev/null
+++ b/roles/wireguard/p2p/tasks/systemd-iptables.service.j2
@@ -0,0 +1,42 @@
+[Unit]
+Wants=network-online.target
+After=network-online.target
+
+
+[Service]
+Type=oneshot
+
+{% if 'ip_snat' in item.value %}
+ExecStart=/usr/sbin/sysctl net.ipv4.ip_forward=1
+{%   for addr in item.value.addresses %}
+ExecStart=/sbin/iptables -t nat -A POSTROUTING -s {{ addr | ipaddr('network/prefix') }} -o {{ item.value.ip_snat.interface }} -j SNAT --to {{ item.value.ip_snat.to }}
+{%   endfor %}
+{% endif %}
+{% for forward in item.value.port_forwardings | default([]) %}
+{%   for port in forward.tcp_ports | default([]) %}
+ExecStart=/sbin/iptables -t nat -A PREROUTING -d {{ forward.dest }} -p tcp --dport {{ port }} -j DNAT --to {{ forward.tcp_ports[port] }}
+{%   endfor %}
+{%   for port in forward.udp_ports | default([]) %}
+ExecStart=/sbin/iptables -t nat -A PREROUTING -d {{ forward.dest }} -p udp --dport {{ port }} -j DNAT --to {{ forward.udp_ports[port] }}
+{%   endfor %}
+{% endfor %}
+
+{% if 'ip_snat' in item.value %}
+{%   for addr in item.value.addresses %}
+ExecStop=/sbin/iptables -t nat -D POSTROUTING -s {{ addr | ipaddr('network/prefix') }} -o {{ item.value.ip_snat.interface }} -j SNAT --to {{ item.value.ip_snat.to }}
+{%   endfor %}
+{% endif %}
+{% for forward in item.value.port_forwardings | default([]) %}
+{%   for port in forward.tcp_ports | default([]) %}
+ExecStop=/sbin/iptables -t nat -D PREROUTING -d {{ forward.dest }} -p tcp --dport {{ port }} -j DNAT --to {{ forward.tcp_ports[port] }}
+{%   endfor %}
+{%   for port in forward.udp_ports | default([]) %}
+ExecStop=/sbin/iptables -t nat -D PREROUTING -d {{ forward.dest }} -p udp --dport {{ port }} -j DNAT --to {{ forward.udp_ports[port] }}
+{%   endfor %}
+{% endfor %}
+
+RemainAfterExit=yes
+
+
+[Install]
+WantedBy=multi-user.target
-- 
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