Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -1421,11 +1421,11 @@
 
 	AC_CHECK_HEADER(sys/socket.h, [
 		AC_DEFINE(OF_HAVE_SYS_SOCKET_H, 1,
 			[Whether we have sys/socket.h])
 	])
-	AC_CHECK_MEMBER([struct sockaddr_storage.ss_family], [
+	AC_CHECK_TYPE([struct sockaddr_storage], [
 		AC_DEFINE(OF_HAVE_SOCKADDR_STORAGE, 1,
 			[Whether we have struct sockaddr_storage])
 	], [], [
 		#ifdef OF_HAVE_SYS_TYPES_H
 		# include <sys/types.h>
@@ -1700,11 +1700,11 @@
 		], [
 			AC_DEFINE(OF_HAVE_APPLETALK, 1,
 			    [Whether we have AppleTalk])
 			AC_SUBST(USE_SRCS_APPLETALK, '${SRCS_APPLETALK}')
 
-			AC_CHECK_MEMBERS([struct ifreq.ifr_name], [
+			AC_CHECK_TYPE([struct ifreq], [
 				AC_DEFINE(OF_HAVE_APPLETALK_IFCONFIG, 1,
 				    m4_normalize([
 					Whether AppleTalk interfaces
 					can be configured
 				]))
@@ -1761,13 +1761,18 @@
 				"OFSelectKernelEventObserver.m")
 		])
 		;;
 	esac
 
-	AC_CHECK_HEADERS(ifaddrs.h)
+	AC_CHECK_HEADERS(ifaddrs.h netpacket/packet.h)
 	AC_CHECK_FUNC(getifaddrs, [
 		AC_DEFINE(OF_HAVE_GETIFADDRS, 1, [Whether we have getifaddrs()])
+	])
+	AC_CHECK_TYPES([struct sockaddr_ll], [], [], [
+		#ifdef HAVE_NETPACKET_PACKET_H
+		# include <netpacket/packet.h>
+		#endif
 	])
 
 	AC_ARG_WITH(tls,
 		AS_HELP_STRING([--with-tls], [
 			enable TLS support using the specified library

Index: src/OFSystemInfo.h
==================================================================
--- src/OFSystemInfo.h
+++ src/OFSystemInfo.h
@@ -27,19 +27,27 @@
  *	  @ref networkInterfaces.
  *
  * Possible keys are:
  *
  *   * @ref OFNetworkInterfaceAddresses
+ *   * @ref OFNetworkInterfaceEthernetAddress
  */
 typedef OFConstantString *OFNetworkInterfaceInfoKey;
 
 /**
  * @brief The addresses of a network interface.
  *
  * This maps to an @ref OFData of @ref OFSocketAddress.
  */
 extern OFConstantString *const OFNetworkInterfaceAddresses;
+
+/**
+ * @brief The Ethernet address of a network interface.
+ *
+ * This maps to an @ref OFData.
+ */
+extern OFConstantString *const OFNetworkInterfaceEthernetAddress;
 #endif
 
 /**
  * @class OFSystemInfo OFSystemInfo.h ObjFW/OFSystemInfo.h
  *

Index: src/OFSystemInfo.m
==================================================================
--- src/OFSystemInfo.m
+++ src/OFSystemInfo.m
@@ -86,10 +86,13 @@
 #endif
 
 #ifdef HAVE_IFADDRS_H
 # include <ifaddrs.h>
 #endif
+#ifdef HAVE_NETPACKET_PACKET_H
+# include <netpacket/packet.h>
+#endif
 
 #if defined(OF_MACOS) || defined(OF_IOS)
 /*
  * These have been dropped from newer iOS SDKs, however, their replacements are
  * not available on iOS < 10. This means it's impossible to search for the
@@ -122,10 +125,12 @@
 #endif
 
 #if defined(OF_HAVE_SOCKETS) && defined(OF_HAVE_GETIFADDRS)
 OFConstantString *const OFNetworkInterfaceAddresses =
     @"OFNetworkInterfaceAddresses";
+OFConstantString *const OFNetworkInterfaceEthernetAddress =
+    @"OFNetworkInterfaceEthernetAddress";
 #endif
 
 static size_t pageSize = 4096;
 static size_t numberOfCPUs = 1;
 static OFString *operatingSystemName = nil;
@@ -903,10 +908,29 @@
 					       forKey: interfaceName];
 			}
 
 			if (iter->ifa_addr == NULL)
 				continue;
+
+# if defined(HAVE_STRUCT_SOCKADDR_LL) && defined(AF_PACKET)
+			if (iter->ifa_addr->sa_family == AF_PACKET) {
+				const OFNetworkInterfaceInfoKey key =
+				    OFNetworkInterfaceEthernetAddress;
+				struct sockaddr_ll *sll = (struct sockaddr_ll *)
+				    (void *)iter->ifa_addr;
+				OFData *addr;
+
+				/* ARP hardware address type 1 is Ethernet. */
+				if (sll->sll_hatype != 1)
+					continue;
+
+				addr = [OFData dataWithItems: sll->sll_addr
+						       count: sll->sll_halen];
+				[interface setObject: addr forKey: key];
+				continue;
+			}
+# endif
 
 			addresses = [interface
 			    objectForKey: OFNetworkInterfaceAddresses];
 			if (addresses == nil) {
 				addresses = [OFMutableData