NetworkConfiguration · ColinMcInnes · Mar 27, 2026
diff --git a/BUILDING.md b/BUILDING.md
@@ -1,3 +1,6 @@
+<!-- SPDX-License-Identifier: BSD-3-Clause -->
+<!-- Copyright (c) 2017-2025 Roy Marples <roy@marples.name> -->
+
 # Building dhcpcd
 
 This attempts to document various ways of building dhcpcd for your

diff --git a/Makefile b/Makefile
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2006-2025 Roy Marples <roy@marples.name>
+
 SUBDIRS=	src hooks
 
 PACKAGE=	dhcpcd

diff --git a/Makefile.inc b/Makefile.inc
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2009-2025 Roy Marples <roy@marples.name>
+
 # System definitions
 
 PICFLAG?=	-fPIC

diff --git a/README.md b/README.md
@@ -1,3 +1,6 @@
+<!-- SPDX-License-Identifier: BSD-3-Clause -->
+<!-- Copyright (c) 2017-2023 Roy Marples <roy@marples.name> -->
+
 # dhcpcd
 
 dhcpcd is a

diff --git a/compat/_strtoi.h b/compat/_strtoi.h
@@ -1,6 +1,7 @@
 /*	$NetBSD: _strtoi.h,v 1.1 2015/01/22 02:15:59 christos Exp $	*/
 
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
  *

diff --git a/compat/arc4random.c b/compat/arc4random.c
@@ -1,6 +1,7 @@
 /*	$OpenBSD: arc4random.c,v 1.58 2022/07/31 13:41:45 tb Exp $	*/
 
 /*
+ * SPDX-License-Identifier: ISC
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
  * Copyright (c) 2008, Damien Miller <djm@openbsd.org>
  * Copyright (c) 2013, Markus Friedl <markus@openbsd.org>

diff --git a/compat/arc4random.h b/compat/arc4random.h
@@ -1,5 +1,6 @@
 /*
  * Arc4 random number generator for OpenBSD.
+ * SPDX-License-Identifier: ISC
  * Copyright 1996 David Mazieres <dm@lcs.mit.edu>.
  *
  * Modification and redistribution in source and binary forms is

diff --git a/compat/arc4random_uniform.c b/compat/arc4random_uniform.c
@@ -1,6 +1,7 @@
 /*	$OpenBSD: arc4random_uniform.c,v 1.3 2019/01/20 02:59:07 bcook Exp $	*/
 
 /*
+ * SPDX-License-Identifier: ISC
  * Copyright (c) 2008, Damien Miller <djm@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any

diff --git a/compat/arc4random_uniform.h b/compat/arc4random_uniform.h
@@ -1,4 +1,5 @@
 /*
+ * SPDX-License-Identifier: ISC
  * Copyright (c) 2008, Damien Miller <djm@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any

diff --git a/compat/bitops.h b/compat/bitops.h
@@ -1,6 +1,7 @@
 /*	$NetBSD: bitops.h,v 1.11 2012/12/07 02:27:58 christos Exp $	*/
 
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright (c) 2007, 2010 The NetBSD Foundation, Inc.
  * All rights reserved.
  *

diff --git a/compat/chacha_private.h b/compat/chacha_private.h
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: CC0-1.0 */
+
 /*
 chacha-merged.c version 20080118
 D. J. Bernstein

diff --git a/compat/consttime_memequal.h b/compat/consttime_memequal.h
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: CC0-1.0 */
+
 /*
  * Written by Matthias Drochner <drochner@NetBSD.org>.
  * Public domain.

diff --git a/compat/crypt/hmac.c b/compat/crypt/hmac.c
@@ -1,6 +1,7 @@
 /*	$NetBSD: hmac.c,v 1.5 2017/10/05 09:59:04 roy Exp $	*/
 
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright (c) 2016 The NetBSD Foundation, Inc.
  * All rights reserved.
  *

diff --git a/compat/crypt/hmac.h b/compat/crypt/hmac.h
@@ -1,6 +1,7 @@
 /*	$NetBSD: hmac.c,v 1.5 2017/10/05 09:59:04 roy Exp $	*/
 
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright (c) 2016 The NetBSD Foundation, Inc.
  * All rights reserved.
  *

diff --git a/compat/crypt/md5.c b/compat/crypt/md5.c
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: CC0-1.0 */
+
 /*
  * This code implements the MD5 message-digest algorithm.
  * The algorithm is due to Ron Rivest.	This code was

diff --git a/compat/crypt/md5.h b/compat/crypt/md5.h
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: CC0-1.0 */
+
 /*
  * This code implements the MD5 message-digest algorithm.
  * The algorithm is due to Ron Rivest.	This code was

diff --git a/compat/crypt/sha256.c b/compat/crypt/sha256.c
@@ -1,4 +1,5 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright 2005 Colin Percival
  * All rights reserved.
  *

diff --git a/compat/crypt/sha256.h b/compat/crypt/sha256.h
@@ -1,4 +1,5 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright 2005 Colin Percival
  * All rights reserved.
  *

diff --git a/compat/dprintf.c b/compat/dprintf.c
@@ -1,5 +1,6 @@
 /*
  * dhcpcd - DHCP client daemon
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright (c) 2006-2017 Roy Marples <roy@marples.name>
  * All rights reserved
 

diff --git a/compat/dprintf.h b/compat/dprintf.h
@@ -1,5 +1,6 @@
 /*
  * dhcpcd - DHCP client daemon
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright (c) 2006-2017 Roy Marples <roy@marples.name>
  * All rights reserved
 

diff --git a/compat/endian.h b/compat/endian.h
@@ -1,5 +1,6 @@
 /*
  * dhcpcd - DHCP client daemon
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright (c) 2006-2014 Roy Marples <roy@marples.name>
  * All rights reserved
 

diff --git a/compat/pidfile.c b/compat/pidfile.c
@@ -1,6 +1,7 @@
 /*	$NetBSD: pidfile.c,v 1.16 2021/08/01 15:29:29 andvar Exp $	*/
 
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright (c) 1999, 2016 The NetBSD Foundation, Inc.
  * All rights reserved.
  *

diff --git a/compat/pidfile.h b/compat/pidfile.h
@@ -1,4 +1,5 @@
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright (c) 1999, 2016 The NetBSD Foundation, Inc.
  * All rights reserved.
  *

diff --git a/compat/queue.h b/compat/queue.h
@@ -1,3 +1,8 @@
+/*
+ * SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (c) 2014-2025 Roy Marples <roy@marples.name>
+ */
+
 /* This stub exists to avoid including queue.h in the vendor folder
  * for source imports */
 #ifdef BSD

diff --git a/compat/reallocarray.c b/compat/reallocarray.c
@@ -1,6 +1,7 @@
 /* $NetBSD: reallocarr.c,v 1.4 2015/08/20 20:08:04 joerg Exp $ */
 
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright (c) 2015 Joerg Sonnenberger <joerg@NetBSD.org>.
  * All rights reserved.
  *

diff --git a/compat/reallocarray.h b/compat/reallocarray.h
@@ -1,6 +1,7 @@
 /* $NetBSD: reallocarr.c,v 1.4 2015/08/20 20:08:04 joerg Exp $ */
 
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright (c) 2015 Joerg Sonnenberger <joerg@NetBSD.org>.
  * All rights reserved.
  *

diff --git a/compat/setproctitle.c b/compat/setproctitle.c
@@ -1,4 +1,5 @@
 /*
+ * SPDX-License-Identifier: MIT
  * Copyright © 2010 William Ahern
  * Copyright © 2012-2013 Guillem Jover <guillem@hadrons.org>
  *

diff --git a/compat/setproctitle.h b/compat/setproctitle.h
@@ -1,4 +1,5 @@
 /*
+ * SPDX-License-Identifier: MIT
  * Copyright © 2010 William Ahern
  * Copyright © 2012-2013 Guillem Jover <guillem@hadrons.org>
  *

diff --git a/compat/strlcpy.c b/compat/strlcpy.c
@@ -1,6 +1,7 @@
 /*	$OpenBSD: strlcpy.c,v 1.16 2019/01/25 00:19:25 millert Exp $	*/
 
 /*
+ * SPDX-License-Identifier: ISC
  * Copyright (c) 1998, 2015 Todd C. Miller <millert@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any

diff --git a/compat/strlcpy.h b/compat/strlcpy.h
@@ -1,6 +1,7 @@
 /*	$OpenBSD: strlcpy.c,v 1.15 2016/10/16 17:37:39 dtucker Exp $	*/
 
 /*
+ * SPDX-License-Identifier: ISC
  * Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
  *
  * Permission to use, copy, modify, and distribute this software for any

diff --git a/compat/strtoi.c b/compat/strtoi.c
@@ -1,6 +1,7 @@
 /*	$NetBSD: strtoi.c,v 1.3 2019/11/28 12:33:23 roy Exp $	*/
 
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright (c) 2005 The DragonFly Project.  All rights reserved.
  * Copyright (c) 2003 Citrus Project,
  * All rights reserved.

diff --git a/compat/strtoi.h b/compat/strtoi.h
@@ -1,4 +1,5 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
  *

diff --git a/compat/strtou.c b/compat/strtou.c
@@ -1,6 +1,7 @@
 /*	$NetBSD: strtou.c,v 1.3 2019/11/28 12:33:23 roy Exp $	*/
 
 /*-
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright (c) 2005 The DragonFly Project.  All rights reserved.
  * Copyright (c) 2003 Citrus Project,
  * All rights reserved.

diff --git a/config-null.mk b/config-null.mk
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2014 Roy Marples <roy@marples.name>
+
 # This space left intentionally blank
 
 DHCPCD_SRCS+=	dhcpcd-embedded.c
diff --git a/configure b/configure
@@ -1,4 +1,7 @@
 #!/bin/sh
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2009-2025 Roy Marples <roy@marples.name>
+
 # Try and be like autotools configure, but without autotools
 
 echo "configure args: $*"

diff --git a/hooks/01-test b/hooks/01-test
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2017-2020 Roy Marples <roy@marples.name>
+
 # Echo the interface flags, reason and message options
 
 if [ "$reason" = "TEST" ]; then

diff --git a/hooks/10-wpa_supplicant b/hooks/10-wpa_supplicant
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2017-2024 Roy Marples <roy@marples.name>
+
 # Start, reconfigure and stop wpa_supplicant per wireless interface.
 #
 # This is only needed when using wpa_supplicant-2.5 or older, OR

diff --git a/hooks/15-timezone b/hooks/15-timezone
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2017-2020 Roy Marples <roy@marples.name>
+
 # Configure timezone
 
 : ${localtime:=/etc/localtime}

diff --git a/hooks/20-resolv.conf b/hooks/20-resolv.conf
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2017-2025 Roy Marples <roy@marples.name>
+
 # Generate /etc/resolv.conf
 # Support resolvconf(8) if available
 # We can merge other dhcpcd resolv.conf files into one like resolvconf,

diff --git a/hooks/29-lookup-hostname b/hooks/29-lookup-hostname
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2017-2022 Roy Marples <roy@marples.name>
+
 # Lookup the hostname in DNS if not set
 
 lookup_hostname()

diff --git a/hooks/30-hostname.in b/hooks/30-hostname.in
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2020-2024 Roy Marples <roy@marples.name>
+
 # Set the hostname from DHCP data if required
 
 # A hostname can either be a short hostname or a FQDN.

diff --git a/hooks/50-dhcpcd-compat b/hooks/50-dhcpcd-compat
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2017 Roy Marples <roy@marples.name>
+
 # Compat enter hook shim for older dhcpcd versions
 
 IPADDR=$new_ip_address

diff --git a/hooks/50-ntp.conf b/hooks/50-ntp.conf
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2017-2026 Roy Marples <roy@marples.name>
+
 # Sample dhcpcd hook script for NTP
 # It will configure either one of NTP, OpenNTP or Chrony (in that order)
 # and will default to NTP if no default config is found.

diff --git a/hooks/50-timesyncd.conf b/hooks/50-timesyncd.conf
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2022-2026 Roy Marples <roy@marples.name>
+
 if [ ! -d /run/systemd/system ]; then
 	return
 fi

diff --git a/hooks/50-yp.conf b/hooks/50-yp.conf
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2017-2020 Roy Marples <roy@marples.name>
+
 # Sample dhcpcd hook for ypbind
 # This script is only suitable for the Linux version.
 

diff --git a/hooks/50-ypbind.in b/hooks/50-ypbind.in
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2017-2021 Roy Marples <roy@marples.name>
+
 # Sample dhcpcd hook for ypbind
 # This script is only suitable for the BSD versions.
 

diff --git a/hooks/Makefile b/hooks/Makefile
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2017-2023 Roy Marples <roy@marples.name>
+
 TOP=	../
 include ${TOP}/iconfig.mk
 

diff --git a/hooks/dhcpcd-run-hooks.8.in b/hooks/dhcpcd-run-hooks.8.in
@@ -1,3 +1,4 @@
+.\" SPDX-License-Identifier: BSD-2-Clause
 .\" Copyright (c) 2006-2025 Roy Marples
 .\" All rights reserved
 .\"

diff --git a/hooks/dhcpcd-run-hooks.in b/hooks/dhcpcd-run-hooks.in
@@ -1,4 +1,7 @@
 #!/bin/sh
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2017-2022 Roy Marples <roy@marples.name>
+
 # dhcpcd client configuration script 
 
 # Handy variables and functions for our hooks to use

diff --git a/iconfig.mk b/iconfig.mk
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2014-2019 Roy Marples <roy@marples.name>
+
 # Nasty hack so that make clean works without configure being run
 TOP?=		.
 _CONFIG_MK!=	test -e ${TOP}/config.mk && \

diff --git a/src/GNUmakefile b/src/GNUmakefile
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2017 Roy Marples <roy@marples.name>
+
 # GNU Make does not automagically include .depend
 # Luckily it does read GNUmakefile over Makefile so we can work around it
 

diff --git a/src/Makefile b/src/Makefile
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2017-2025 Roy Marples <roy@marples.name>
+
 # dhcpcd Makefile
 
 PROG=		dhcpcd

diff --git a/src/dev/Makefile b/src/dev/Makefile
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2017-2025 Roy Marples <roy@marples.name>
+
 TOP=	../../
 include ${TOP}/Makefile.inc
 include ${TOP}/config.mk

diff --git a/src/dhcpcd-definitions-small.conf b/src/dhcpcd-definitions-small.conf
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: BSD-2-Clause
 # Copyright (c) 2006-2025 Roy Marples <roy@marples.name>
 # All rights reserved
 

diff --git a/src/dhcpcd-definitions.conf b/src/dhcpcd-definitions.conf
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: BSD-2-Clause
 # Copyright (c) 2006-2025 Roy Marples <roy@marples.name>
 # All rights reserved
 

diff --git a/src/dhcpcd-embedded.c.in b/src/dhcpcd-embedded.c.in
@@ -6,6 +6,7 @@
 
 /*
  * dhcpcd - DHCP client daemon
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright (c) 2006-2025 Roy Marples <roy@marples.name>
  * All rights reserved
 

diff --git a/src/dhcpcd-embedded.h.in b/src/dhcpcd-embedded.h.in
@@ -1,5 +1,6 @@
 /*
  * dhcpcd - DHCP client daemon
+ * SPDX-License-Identifier: BSD-2-Clause
  * Copyright (c) 2006-2025 Roy Marples <roy@marples.name>
  * All rights reserved