[Qemu-devel] [PATCH v2 2/4] slirp: clarify license of slirp files using SPDX

[Marc-André Lureau]

The slirp source files have different license headers, sometime
partial, sometime refering to COPYRIGHT file. All files under slirp
are BSD-3. Add SPDX license identifier to clarify the license.

Signed-off-by: Marc-André Lureau <address@hidden>
---
 slirp/src/bootp.h      | 1 +
 slirp/src/debug.h      | 1 +
 slirp/src/dhcpv6.h     | 1 +
 slirp/src/if.h         | 1 +
 slirp/src/ip.h         | 1 +
 slirp/src/ip6.h        | 1 +
 slirp/src/ip6_icmp.h   | 1 +
 slirp/src/ip_icmp.h    | 1 +
 slirp/src/libslirp.h   | 1 +
 slirp/src/main.h       | 1 +
 slirp/src/mbuf.h       | 1 +
 slirp/src/misc.h       | 1 +
 slirp/src/ncsi-pkt.h   | 1 +
 slirp/src/qtailq.h     | 1 +
 slirp/src/sbuf.h       | 1 +
 slirp/src/slirp.h      | 1 +
 slirp/src/socket.h     | 1 +
 slirp/src/state.h      | 0
 slirp/src/stream.h     | 1 +
 slirp/src/tcp.h        | 1 +
 slirp/src/tcp_timer.h  | 1 +
 slirp/src/tcp_var.h    | 1 +
 slirp/src/tcpip.h      | 1 +
 slirp/src/tftp.h       | 1 +
 slirp/src/udp.h        | 1 +
 slirp/src/util.h       | 1 +
 slirp/src/vmstate.h    | 1 +
 slirp/src/arp_table.c  | 1 +
 slirp/src/bootp.c      | 1 +
 slirp/src/cksum.c      | 1 +
 slirp/src/dhcpv6.c     | 1 +
 slirp/src/dnssearch.c  | 1 +
 slirp/src/if.c         | 1 +
 slirp/src/ip6_icmp.c   | 1 +
 slirp/src/ip6_input.c  | 1 +
 slirp/src/ip6_output.c | 1 +
 slirp/src/ip_icmp.c    | 1 +
 slirp/src/ip_input.c   | 1 +
 slirp/src/ip_output.c  | 1 +
 slirp/src/mbuf.c       | 1 +
 slirp/src/misc.c       | 1 +
 slirp/src/ncsi.c       | 1 +
 slirp/src/ndp_table.c  | 1 +
 slirp/src/sbuf.c       | 1 +
 slirp/src/slirp.c      | 1 +
 slirp/src/socket.c     | 1 +
 slirp/src/state.c      | 1 +
 slirp/src/stream.c     | 1 +
 slirp/src/tcp_input.c  | 1 +
 slirp/src/tcp_output.c | 1 +
 slirp/src/tcp_subr.c   | 1 +
 slirp/src/tcp_timer.c  | 1 +
 slirp/src/tftp.c       | 1 +
 slirp/src/udp.c        | 1 +
 slirp/src/udp6.c       | 1 +
 slirp/src/util.c       | 1 +
 slirp/src/vmstate.c    | 1 +
 57 files changed, 56 insertions(+)
 delete mode 100644 slirp/src/state.h

diff --git a/slirp/src/bootp.h b/slirp/src/bootp.h
index 4043489835..d881ad620a 100644
--- a/slirp/src/bootp.h
+++ b/slirp/src/bootp.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /* bootp/dhcp defines */
 
 #ifndef SLIRP_BOOTP_H
diff --git a/slirp/src/debug.h b/slirp/src/debug.h
index 44d922df37..2e503ad7fa 100644
--- a/slirp/src/debug.h
+++ b/slirp/src/debug.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1995 Danny Gasparovski.
  *
diff --git a/slirp/src/dhcpv6.h b/slirp/src/dhcpv6.h
index af0e193b06..dc26a93cff 100644
--- a/slirp/src/dhcpv6.h
+++ b/slirp/src/dhcpv6.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Definitions and prototypes for SLIRP stateless DHCPv6
  *
diff --git a/slirp/src/if.h b/slirp/src/if.h
index 69569c10df..8a60c4e052 100644
--- a/slirp/src/if.h
+++ b/slirp/src/if.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1995 Danny Gasparovski.
  *
diff --git a/slirp/src/ip.h b/slirp/src/ip.h
index 73a4d2a3d2..1484de1176 100644
--- a/slirp/src/ip.h
+++ b/slirp/src/ip.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/ip6.h b/slirp/src/ip6.h
index 1b3364f960..33683c8e20 100644
--- a/slirp/src/ip6.h
+++ b/slirp/src/ip6.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 2013
  * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne.
diff --git a/slirp/src/ip6_icmp.h b/slirp/src/ip6_icmp.h
index e8ed753db5..d8d13e30fc 100644
--- a/slirp/src/ip6_icmp.h
+++ b/slirp/src/ip6_icmp.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 2013
  * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne.
diff --git a/slirp/src/ip_icmp.h b/slirp/src/ip_icmp.h
index a4e5b8b265..05d85c59dd 100644
--- a/slirp/src/ip_icmp.h
+++ b/slirp/src/ip_icmp.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/libslirp.h b/slirp/src/libslirp.h
index 2d13950065..3b28764bec 100644
--- a/slirp/src/libslirp.h
+++ b/slirp/src/libslirp.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 #ifndef LIBSLIRP_H
 #define LIBSLIRP_H
 
diff --git a/slirp/src/main.h b/slirp/src/main.h
index f11d4572b7..a88774215f 100644
--- a/slirp/src/main.h
+++ b/slirp/src/main.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1995 Danny Gasparovski.
  *
diff --git a/slirp/src/mbuf.h b/slirp/src/mbuf.h
index e2d443418a..732c85c63c 100644
--- a/slirp/src/mbuf.h
+++ b/slirp/src/mbuf.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1988, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/misc.h b/slirp/src/misc.h
index c2ceadb591..4eaa2466d7 100644
--- a/slirp/src/misc.h
+++ b/slirp/src/misc.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1995 Danny Gasparovski.
  *
diff --git a/slirp/src/ncsi-pkt.h b/slirp/src/ncsi-pkt.h
index 3867feb1d3..4c0be39f6e 100644
--- a/slirp/src/ncsi-pkt.h
+++ b/slirp/src/ncsi-pkt.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright Gavin Shan, IBM Corporation 2016.
  *
diff --git a/slirp/src/qtailq.h b/slirp/src/qtailq.h
index a89b0c439a..d8aa0e19a4 100644
--- a/slirp/src/qtailq.h
+++ b/slirp/src/qtailq.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*      $NetBSD: queue.h,v 1.52 2009/04/20 09:56:08 mschuett Exp $ */
 
 /*
diff --git a/slirp/src/sbuf.h b/slirp/src/sbuf.h
index 1cb9a42834..ece616e317 100644
--- a/slirp/src/sbuf.h
+++ b/slirp/src/sbuf.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1995 Danny Gasparovski.
  *
diff --git a/slirp/src/slirp.h b/slirp/src/slirp.h
index 8068ba1d1e..39580934f3 100644
--- a/slirp/src/slirp.h
+++ b/slirp/src/slirp.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 #ifndef SLIRP_H
 #define SLIRP_H
 
diff --git a/slirp/src/socket.h b/slirp/src/socket.h
index e4d12cd591..10a0c78a26 100644
--- a/slirp/src/socket.h
+++ b/slirp/src/socket.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1995 Danny Gasparovski.
  *
diff --git a/slirp/src/state.h b/slirp/src/state.h
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/slirp/src/stream.h b/slirp/src/stream.h
index 985334c043..08bb5b6610 100644
--- a/slirp/src/stream.h
+++ b/slirp/src/stream.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 #ifndef STREAM_H_
 #define STREAM_H_
 
diff --git a/slirp/src/tcp.h b/slirp/src/tcp.h
index 47aaea6c5b..79d3251bb5 100644
--- a/slirp/src/tcp.h
+++ b/slirp/src/tcp.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/tcp_timer.h b/slirp/src/tcp_timer.h
index b25b3911d7..709f63987a 100644
--- a/slirp/src/tcp_timer.h
+++ b/slirp/src/tcp_timer.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/tcp_var.h b/slirp/src/tcp_var.h
index 27ef1a51cb..162be6e95e 100644
--- a/slirp/src/tcp_var.h
+++ b/slirp/src/tcp_var.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1993, 1994
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/tcpip.h b/slirp/src/tcpip.h
index 07dbf2c432..560a86417c 100644
--- a/slirp/src/tcpip.h
+++ b/slirp/src/tcpip.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/tftp.h b/slirp/src/tftp.h
index a4c4a64e64..3fe3b70205 100644
--- a/slirp/src/tftp.h
+++ b/slirp/src/tftp.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /* tftp defines */
 
 #ifndef SLIRP_TFTP_H
diff --git a/slirp/src/udp.h b/slirp/src/udp.h
index 3d29504caa..29c0297179 100644
--- a/slirp/src/udp.h
+++ b/slirp/src/udp.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/util.h b/slirp/src/util.h
index e94ee4e7f1..bbe578a2eb 100644
--- a/slirp/src/util.h
+++ b/slirp/src/util.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 2003-2008 Fabrice Bellard
  * Copyright (c) 2010-2019 Red Hat, Inc.
diff --git a/slirp/src/vmstate.h b/slirp/src/vmstate.h
index 21157b5ec2..44efea7b50 100644
--- a/slirp/src/vmstate.h
+++ b/slirp/src/vmstate.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * QEMU migration/snapshot declarations
  *
diff --git a/slirp/src/arp_table.c b/slirp/src/arp_table.c
index 58eafdcfd8..6fee5c1abd 100644
--- a/slirp/src/arp_table.c
+++ b/slirp/src/arp_table.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * ARP table
  *
diff --git a/slirp/src/bootp.c b/slirp/src/bootp.c
index d396849a05..b3ae539dc1 100644
--- a/slirp/src/bootp.c
+++ b/slirp/src/bootp.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * QEMU BOOTP/DHCP server
  *
diff --git a/slirp/src/cksum.c b/slirp/src/cksum.c
index 25bfa67348..9599f6a280 100644
--- a/slirp/src/cksum.c
+++ b/slirp/src/cksum.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1988, 1992, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/dhcpv6.c b/slirp/src/dhcpv6.c
index df350e9f26..3c8f420912 100644
--- a/slirp/src/dhcpv6.c
+++ b/slirp/src/dhcpv6.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * SLIRP stateless DHCPv6
  *
diff --git a/slirp/src/dnssearch.c b/slirp/src/dnssearch.c
index c459cece8d..5bf532d047 100644
--- a/slirp/src/dnssearch.c
+++ b/slirp/src/dnssearch.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Domain search option for DHCP (RFC 3397)
  *
diff --git a/slirp/src/if.c b/slirp/src/if.c
index 1830cc396c..b8cddebf66 100644
--- a/slirp/src/if.c
+++ b/slirp/src/if.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1995 Danny Gasparovski.
  *
diff --git a/slirp/src/ip6_icmp.c b/slirp/src/ip6_icmp.c
index c1e3d30470..5642457fdd 100644
--- a/slirp/src/ip6_icmp.c
+++ b/slirp/src/ip6_icmp.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 2013
  * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne.
diff --git a/slirp/src/ip6_input.c b/slirp/src/ip6_input.c
index 1b8c003c66..d9d2b7e9cd 100644
--- a/slirp/src/ip6_input.c
+++ b/slirp/src/ip6_input.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 2013
  * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne.
diff --git a/slirp/src/ip6_output.c b/slirp/src/ip6_output.c
index 19d1ae7748..b86110662c 100644
--- a/slirp/src/ip6_output.c
+++ b/slirp/src/ip6_output.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 2013
  * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne.
diff --git a/slirp/src/ip_icmp.c b/slirp/src/ip_icmp.c
index 120108f582..1aea18afa7 100644
--- a/slirp/src/ip_icmp.c
+++ b/slirp/src/ip_icmp.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1988, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/ip_input.c b/slirp/src/ip_input.c
index e0b94b0e42..6ad6765938 100644
--- a/slirp/src/ip_input.c
+++ b/slirp/src/ip_input.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1988, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/ip_output.c b/slirp/src/ip_output.c
index f6ec141df5..9299997efb 100644
--- a/slirp/src/ip_output.c
+++ b/slirp/src/ip_output.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1988, 1990, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/mbuf.c b/slirp/src/mbuf.c
index 521c02c967..f079a86d78 100644
--- a/slirp/src/mbuf.c
+++ b/slirp/src/mbuf.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1995 Danny Gasparovski
  *
diff --git a/slirp/src/misc.c b/slirp/src/misc.c
index 937a418d4e..da41f3bb5f 100644
--- a/slirp/src/misc.c
+++ b/slirp/src/misc.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1995 Danny Gasparovski.
  *
diff --git a/slirp/src/ncsi.c b/slirp/src/ncsi.c
index 1169da8241..6d574ec5ec 100644
--- a/slirp/src/ncsi.c
+++ b/slirp/src/ncsi.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * NC-SI (Network Controller Sideband Interface) "echo" model
  *
diff --git a/slirp/src/ndp_table.c b/slirp/src/ndp_table.c
index 34ea4fdf1f..78324877e2 100644
--- a/slirp/src/ndp_table.c
+++ b/slirp/src/ndp_table.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 2013
  * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne.
diff --git a/slirp/src/sbuf.c b/slirp/src/sbuf.c
index 51a9f0cc7d..815823ffbe 100644
--- a/slirp/src/sbuf.c
+++ b/slirp/src/sbuf.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1995 Danny Gasparovski.
  *
diff --git a/slirp/src/slirp.c b/slirp/src/slirp.c
index 18af670a0a..8eddf338c2 100644
--- a/slirp/src/slirp.c
+++ b/slirp/src/slirp.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * libslirp glue
  *
diff --git a/slirp/src/socket.c b/slirp/src/socket.c
index f2428a3ae8..ad58262a06 100644
--- a/slirp/src/socket.c
+++ b/slirp/src/socket.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1995 Danny Gasparovski.
  *
diff --git a/slirp/src/state.c b/slirp/src/state.c
index f5dd80cdc8..533c67205a 100644
--- a/slirp/src/state.c
+++ b/slirp/src/state.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * libslirp
  *
diff --git a/slirp/src/stream.c b/slirp/src/stream.c
index d114dde334..902af05694 100644
--- a/slirp/src/stream.c
+++ b/slirp/src/stream.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * libslirp io streams
  *
diff --git a/slirp/src/tcp_input.c b/slirp/src/tcp_input.c
index b10477fc57..cf54eeee92 100644
--- a/slirp/src/tcp_input.c
+++ b/slirp/src/tcp_input.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1994
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/tcp_output.c b/slirp/src/tcp_output.c
index e9674df121..272c261d07 100644
--- a/slirp/src/tcp_output.c
+++ b/slirp/src/tcp_output.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1988, 1990, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/tcp_subr.c b/slirp/src/tcp_subr.c
index 1db59caa89..086e4e98e2 100644
--- a/slirp/src/tcp_subr.c
+++ b/slirp/src/tcp_subr.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1988, 1990, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/tcp_timer.c b/slirp/src/tcp_timer.c
index 7be54570af..be361a1bb6 100644
--- a/slirp/src/tcp_timer.c
+++ b/slirp/src/tcp_timer.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1988, 1990, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/tftp.c b/slirp/src/tftp.c
index 2d8f978786..612cbf0398 100644
--- a/slirp/src/tftp.c
+++ b/slirp/src/tftp.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * tftp.c - a simple, read-only tftp server for qemu
  *
diff --git a/slirp/src/udp.c b/slirp/src/udp.c
index fa9f4a08bd..27bb829c37 100644
--- a/slirp/src/udp.c
+++ b/slirp/src/udp.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 1982, 1986, 1988, 1990, 1993
  *     The Regents of the University of California.  All rights reserved.
diff --git a/slirp/src/udp6.c b/slirp/src/udp6.c
index be5cba1f54..bfcc7ec6fa 100644
--- a/slirp/src/udp6.c
+++ b/slirp/src/udp6.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 2013
  * Guillaume Subiron
diff --git a/slirp/src/util.c b/slirp/src/util.c
index 5ec2fa87ab..1b2e1e8ee3 100644
--- a/slirp/src/util.c
+++ b/slirp/src/util.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * util.c (mostly based on QEMU os-win32.c)
  *
diff --git a/slirp/src/vmstate.c b/slirp/src/vmstate.c
index 3bc23d1d73..43bb3ebc6f 100644
--- a/slirp/src/vmstate.c
+++ b/slirp/src/vmstate.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * VMState interpreter
  *
-- 
2.21.0.4.g36eb1cb9cf