From cc1b02f99e457d2a5a440698e9bae1ca30f408e1 Mon Sep 17 00:00:00 2001
From: Jan Tuomi <jan@jantuomi.fi>
Date: Fri, 25 Jul 2025 00:09:01 +0300
Subject: Initial impl of vnet jails

---
 templates/etc_jail.conf.j2 | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

(limited to 'templates/etc_jail.conf.j2')

diff --git a/templates/etc_jail.conf.j2 b/templates/etc_jail.conf.j2
index bcfcef0..86da8de 100644
--- a/templates/etc_jail.conf.j2
+++ b/templates/etc_jail.conf.j2
@@ -1,7 +1,19 @@
-# STARTUP/LOGGING
-exec.start = "/bin/sh /etc/rc";
-exec.stop = "/bin/sh /etc/rc.shutdown";
-exec.consolelog = "/var/log/jail_console_${name}.log";
+# STARTUP/LOGGING/VNET
+$epair            = "epair${num}"; # epairXa is host end, epairXb is jail end
+vnet;
+vnet.interface    = "${epair}b";
+persist;
+exec.prestart    += "ifconfig $epair create || echo 'Failed to create $epair'";
+exec.prestart    += "ifconfig ${epair}a up";
+exec.prestart    += "ifconfig bridge0 addm ${epair}a";
+exec.clean;
+exec.start        = "/bin/sh /etc/rc";
+exec.poststart    = "jexec ${name} ifconfig ${epair}b 192.168.2.${num}/16";
+exec.poststart   += "jexec ${name} route add default 192.168.0.1 || echo 'Failed to add default route'";
+exec.stop         = "/bin/sh /etc/rc.shutdown";
+exec.poststop    += "ifconfig ${epair}b -vnet $name"; # workaround to bug 238326: move ${epair}b from the jail to the host when stopping jail services
+exec.poststop    += "ifconfig ${epair}b destroy";     # and then destroy the pair by destroying one end of it
+exec.consolelog   = "/var/log/jail_console_${name}.log";
 
 # PERMISSIONS
 allow.raw_sockets;
@@ -15,8 +27,7 @@ path = "/usr/local/jails/containers/${name}";
 # JAILS
 {% for jail in jails %}
 {{ jail.name }} {
-  ip4.addr = {{ jail.ip }};
-  interface = lan0;
+  $num           = "{{ jail.num }}";
 }
 
 {% endfor %}
-- 
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