From b3ff3efed9918c7708996cbbe93e2c671679cc26 Mon Sep 17 00:00:00 2001
From: tschettervictor <85497460+tschettervictor@users.noreply.github.com>
Date: Fri, 24 Jan 2025 06:49:19 -0700
Subject: [PATCH] common: Add comment about MAC address

---
 usr/local/share/bastille/common.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/usr/local/share/bastille/common.sh b/usr/local/share/bastille/common.sh
index 583bafb0..c2017841 100644
--- a/usr/local/share/bastille/common.sh
+++ b/usr/local/share/bastille/common.sh
@@ -230,7 +230,9 @@ generate_static_mac() {
     local jail_name="${1}"
     local external_interface="${2}"
     local external_interface_mac="$(ifconfig ${external_interface} | grep ether | awk '{print $2}')"
+    # Use FreeBSD vendor MAC prefix (58:9c:fc) for jail MAC prefix
     local macaddr_prefix="58:9c:fc"
+    # Use hash of interface+jailname for jail MAC suffix
     local macaddr_suffix="$(echo -n "${external_interface_mac}${jail_name}" | sed 's#:##g' | sha256 | cut -b -5 | sed 's/\([0-9a-fA-F][0-9a-fA-F]\)\([0-9a-fA-F][0-9a-fA-F]\)\([0-9a-fA-F]\)/\1:\2:\3/')"
     if [ -z "${macaddr_prefix}" ] || [ -z "${macaddr_suffix}" ]; then
         error_notify "Failed to generate MAC address."