tests: check decoding of NFNL_SUBSYS_NFTABLES netlink message types

* configure.ac (AC_CHECK_HEADERS): Add linux/netfilter/nf_tables.h.
* tests/nfnetlink_nftables.c: New file.
* tests/gen_tests.in (nfnetlink_nftables): New entry.
* tests/pure_executables.list: Add nfnetlink_nftables.
* tests/.gitignore: Likewise.

configure.ac

@@ -399,6 +399,7 @@ AC_CHECK_HEADERS(m4_normalize([
 	linux/msg.h
 	linux/neighbour.h
 	linux/netfilter/ipset/ip_set.h
+	linux/netfilter/nf_tables.h
 	linux/netfilter/nfnetlink.h
 	linux/netfilter/nfnetlink_acct.h
 	linux/netfilter/nfnetlink_conntrack.h

tests/.gitignore

@@ -224,6 +224,7 @@ nfnetlink_ctnetlink
 nfnetlink_ctnetlink_exp
 nfnetlink_cttimeout
 nfnetlink_ipset
+nfnetlink_nftables
 nfnetlink_osf
 nfnetlink_queue
 nfnetlink_ulog

tests/gen_tests.in

@@ -204,6 +204,7 @@ nfnetlink_ctnetlink		+netlink_sock_diag.test
 nfnetlink_ctnetlink_exp		+netlink_sock_diag.test
 nfnetlink_cttimeout		+netlink_sock_diag.test
 nfnetlink_ipset			+netlink_sock_diag.test
+nfnetlink_nftables		+netlink_sock_diag.test
 nfnetlink_osf			+netlink_sock_diag.test
 nfnetlink_queue			+netlink_sock_diag.test
 nfnetlink_ulog			+netlink_sock_diag.test

tests/nfnetlink_nftables.c

@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
+ * Copyright (c) 2017 The strace developers.
+ * All rights reserved.
+ *
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
+ */
+
+#include "tests.h"
+
+#ifdef HAVE_LINUX_NETFILTER_NF_TABLES_H
+
+# include <stdio.h>
+# include <sys/socket.h>
+# include "netlink.h"
+# include <linux/netfilter/nfnetlink.h>
+# include <linux/netfilter/nf_tables.h>
+
+static void
+test_nlmsg_type(const int fd)
+{
+	long rc;
+	struct nlmsghdr nlh = {
+		.nlmsg_len = sizeof(nlh),
+		.nlmsg_flags = NLM_F_REQUEST,
+	};
+
+	nlh.nlmsg_type = NFNL_SUBSYS_NFTABLES << 8 | NFT_MSG_NEWTABLE;
+	rc = sendto(fd, &nlh, nlh.nlmsg_len, MSG_DONTWAIT, NULL, 0);
+	printf("sendto(%d, {len=%u"
+	       ", type=NFNL_SUBSYS_NFTABLES<<8|NFT_MSG_NEWTABLE"
+	       ", flags=NLM_F_REQUEST, seq=0, pid=0}"
+	       ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+	       fd, nlh.nlmsg_len, nlh.nlmsg_len, sprintrc(rc));
+
+	nlh.nlmsg_type = NFNL_SUBSYS_NFTABLES << 8 | 0xff;
+	rc = sendto(fd, &nlh, nlh.nlmsg_len, MSG_DONTWAIT, NULL, 0);
+	printf("sendto(%d, {len=%u"
+	       ", type=NFNL_SUBSYS_NFTABLES<<8|0xff /* NFT_MSG_??? */"
+	       ", flags=NLM_F_REQUEST, seq=0, pid=0}"
+	       ", %u, MSG_DONTWAIT, NULL, 0) = %s\n",
+	       fd, nlh.nlmsg_len, nlh.nlmsg_len, sprintrc(rc));
+}
+
+int
+main(void)
+{
+	skip_if_unavailable("/proc/self/fd/");
+
+	int fd = create_nl_socket(NETLINK_NETFILTER);
+
+	test_nlmsg_type(fd);
+
+	puts("+++ exited with 0 +++");
+
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("HAVE_LINUX_NETFILTER_NF_TABLES_H")
+
+#endif

tests/pure_executables.list

@@ -185,6 +185,7 @@ nfnetlink_cthelper
 nfnetlink_ctnetlink
 nfnetlink_ctnetlink_exp
 nfnetlink_cttimeout
+nfnetlink_nftables
 nfnetlink_ipset
 nfnetlink_osf
 nfnetlink_queue