From 73aa5b47fa948f03c2482fc1b6d6070ef722f541 Mon Sep 17 00:00:00 2001
From: Fernando Fernandez Mancera <ffmancera@riseup.net>
Date: Wed, 18 Dec 2024 11:23:25 +0100
Subject: [PATCH] glib-aux: add nm_ether_addr_hash() helper

Add a hash generation helper for NMEtherAddr struct. This can be used
for HashTables containing pointers to NMEtherAddr structs.

(cherry picked from commit a63eec924cccf324b82a66fccc9d72d49bb2adfc)
(cherry picked from commit 6371802087caf883e6880e4049c578ff1b7318e0)
---
 src/libnm-glib-aux/nm-shared-utils.c | 11 +++++++++++
 src/libnm-glib-aux/nm-shared-utils.h |  2 ++
 2 files changed, 13 insertions(+)

diff --git a/src/libnm-glib-aux/nm-shared-utils.c b/src/libnm-glib-aux/nm-shared-utils.c
index 421e4d1bef..25c78fd31a 100644
--- a/src/libnm-glib-aux/nm-shared-utils.c
+++ b/src/libnm-glib-aux/nm-shared-utils.c
@@ -58,6 +58,17 @@ nm_ether_addr_from_string(NMEtherAddr *addr, const char *str)
     return addr;
 }
 
+guint
+nm_ether_addr_hash(const NMEtherAddr *a)
+{
+    NMHashState h;
+
+    nm_hash_init(&h, 1947951703u);
+    nm_hash_update(&h, a, sizeof(NMEtherAddr));
+
+    return nm_hash_complete(&h);
+}
+
 /*****************************************************************************/
 
 /**
diff --git a/src/libnm-glib-aux/nm-shared-utils.h b/src/libnm-glib-aux/nm-shared-utils.h
index ca9feb6080..70f1912e3c 100644
--- a/src/libnm-glib-aux/nm-shared-utils.h
+++ b/src/libnm-glib-aux/nm-shared-utils.h
@@ -240,6 +240,8 @@ nm_ether_addr_is_zero(const NMEtherAddr *a)
     return nm_memeq(a, &nm_ether_addr_zero, sizeof(NMEtherAddr));
 }
 
+guint nm_ether_addr_hash(const NMEtherAddr *a);
+
 /*****************************************************************************/
 
 struct ether_addr;