git: 96a0db365f5d - stable/13 - netlink: add rtsock-compatible header to use with netlink snl(3).

The branch stable/13 has been updated by melifaro:

URL: https://cgit.FreeBSD.org/src/commit/?id=96a0db365f5d315fd97b480bb3ecc84cba296d8d

commit 96a0db365f5d315fd97b480bb3ecc84cba296d8d
Author:     Alexander V. Chernikov <melifaro@FreeBSD.org>
AuthorDate: 2023-03-09 14:36:52 +0000
Commit:     Alexander V. Chernikov <melifaro@FreeBSD.org>
CommitDate: 2023-04-08 19:05:50 +0000

    netlink: add rtsock-compatible header to use with netlink snl(3).
    
    Some routing socket defines (`RTM_` and `RTA_` ones) clash with the ones
     used by the the Netlink.
    As some rtsock definitions like interface flags or route flags are used in
     both netlink and rtsock, provide a convenient way to include those without
     running into the define collision.
    
    Differential Revision: https://reviews.freebsd.org/D38982
    MFC after:      2 weeks
    
    (cherry picked from commit 90d625122886a2db5b66d248807b89f4a0270466)
---
 sys/net/route.h                        |  7 +++++
 sys/netlink/netlink_snl_route_compat.h | 50 ++++++++++++++++++++++++++++++++++
 2 files changed, 57 insertions(+)

diff --git a/sys/net/route.h b/sys/net/route.h
index 3dac437426b0..870ebbc0bc75 100644
--- a/sys/net/route.h
+++ b/sys/net/route.h
@@ -268,6 +268,7 @@ struct rt_msghdr {
 
 #define RTM_VERSION	5	/* Up the ante and ignore older versions */
 
+#ifndef NETLINK_COMPAT
 /*
  * Message types.
  *
@@ -300,6 +301,8 @@ struct rt_msghdr {
 #define	RTM_IFANNOUNCE	0x11	/* (5) iface arrival/departure */
 #define	RTM_IEEE80211	0x12	/* (5) IEEE80211 wireless event */
 
+#endif /* NETLINK_COMPAT*/
+
 /*
  * Bitmask values for rtm_inits and rmx_locks.
  */
@@ -313,6 +316,8 @@ struct rt_msghdr {
 #define RTV_RTTVAR	0x80	/* init or lock _rttvar */
 #define RTV_WEIGHT	0x100	/* init or lock _weight */
 
+#ifndef NETLINK_COMPAT
+
 /*
  * Bitmask values for rtm_addrs.
  */
@@ -325,6 +330,8 @@ struct rt_msghdr {
 #define RTA_AUTHOR	0x40	/* sockaddr for author of redirect */
 #define RTA_BRD		0x80	/* for NEWADDR, broadcast or p-p dest addr */
 
+#endif /* NETLINK_COMPAT*/
+
 /*
  * Index offsets for sockaddr array for alternate internal encoding.
  */
diff --git a/sys/netlink/netlink_snl_route_compat.h b/sys/netlink/netlink_snl_route_compat.h
new file mode 100644
index 000000000000..51904abb4003
--- /dev/null
+++ b/sys/netlink/netlink_snl_route_compat.h
@@ -0,0 +1,50 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2023 Alexander V. Chernikov <melifaro@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#ifndef	_NETLINK_NETLINK_SNL_ROUTE_COMPAT_H_
+#define	_NETLINK_NETLINK_SNL_ROUTE_COMPAT_H_
+
+/*
+ * This file contains netlink-compatible definitions from the
+ * net/route.h header.
+ */
+#define	NETLINK_COMPAT
+
+#include <net/route.h>
+
+#define	RTSOCK_RTM_ADD		0x1
+#define	RTSOCK_RTM_DELETE	0x2
+#define	RTSOCK_RTM_CHANGE	0x3
+#define	RTSOCK_RTM_GET		0x4
+#define	RTSOCK_RTM_NEWADDR	0xc
+#define	RTSOCK_RTM_DELADDR	0xd
+#define	RTSOCK_RTM_IFINFO	0xe
+#define	RTSOCK_RTM_NEWMADDR	0xf
+#define	RTSOCK_RTM_DELMADDR	0x10
+#define	RTSOCK_RTM_IFANNOUNCE	0x11
+#define	RTSOCK_RTM_IEEE80211	0x12
+
+#endif