From: Álvaro Fernández Rojas <noltari@gmail.com>
Date: Tue, 13 Jan 2026 17:19:48 +0000 (+0100)
Subject: base-files: introduce a function to generate IAID
X-Git-Tag: v25.12.0-rc3~31
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5d094635118ba1e9cc89abbbabd7e267bd7af3a;p=thirdparty%2Fopenwrt.git

base-files: introduce a function to generate IAID

Add new function "network_generate_iface_iaid()" to generate a stable IAID
from an interface name.

(cherry picked from commit e1f2b666ff94f2b8a50ca000d69f5b5f0b89a27c)
Link: https://github.com/openwrt/openwrt/pull/21489
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
---

diff --git a/package/base-files/files/lib/functions/network.sh b/package/base-files/files/lib/functions/network.sh
index 4851a5817ad..54ca7b00d49 100644
--- a/package/base-files/files/lib/functions/network.sh
+++ b/package/base-files/files/lib/functions/network.sh
@@ -24,6 +24,17 @@ __network_ifstatus() {
 	eval "$__tmp"
 }
 
+# determine the IAID of the given logical interface
+# 1: destination variable
+# 2: interface
+network_generate_iface_iaid() {
+	local __iaid
+
+	__iaid=$(printf '%s' "$2" | md5sum | cut -c 1-8)
+
+	export "$1=$__iaid"
+}
+
 # determine first IPv4 address of given logical interface
 # 1: destination variable
 # 2: interface