[PATCH 17/27] tests: check decoding of NETLINK_ROUTE rtmsg netlink attribute

[JingPiao Chen]

* tests/nlattr_rtmsg.c: New file.
* tests/gen_tests.in (nlattr_rtmsg): New entry.
* tests/pure_executables.list: Add nlattr_rtmsg.
* tests/.gitignore: Likewise.
---
 tests/.gitignore            |  1 +
 tests/gen_tests.in          |  1 +
 tests/nlattr_rtmsg.c        | 96 +++++++++++++++++++++++++++++++++++++++++++++
 tests/pure_executables.list |  1 +
 4 files changed, 99 insertions(+)
 create mode 100644 tests/nlattr_rtmsg.c

diff --git a/tests/.gitignore b/tests/.gitignore
index b4443a4..64dfcb2 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -226,6 +226,7 @@ nlattr_inet_diag_req_v2
 nlattr_netlink_diag_msg
 nlattr_nlmsgerr
 nlattr_packet_diag_msg
+nlattr_rtmsg
 nlattr_smc_diag_msg
 nlattr_unix_diag_msg
 nsyscalls
diff --git a/tests/gen_tests.in b/tests/gen_tests.in
index b3c9812..4de4f0f 100644
--- a/tests/gen_tests.in
+++ b/tests/gen_tests.in
@@ -206,6 +206,7 @@ nlattr_inet_diag_req_v2		+netlink_sock_diag.test
 nlattr_netlink_diag_msg		+netlink_sock_diag.test
 nlattr_nlmsgerr			+netlink_sock_diag.test
 nlattr_packet_diag_msg		+netlink_sock_diag-v.sh
+nlattr_rtmsg			+netlink_sock_diag.test
 nlattr_smc_diag_msg		+netlink_sock_diag.test
 nlattr_unix_diag_msg		+netlink_sock_diag.test
 old_mmap	-a11 -e trace=mmap
diff --git a/tests/nlattr_rtmsg.c b/tests/nlattr_rtmsg.c
new file mode 100644
index 0000000..7671457
--- /dev/null
+++ b/tests/nlattr_rtmsg.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2017 JingPiao Chen <chenjingpiao at 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"
+
+#include <stdio.h>
+#include <stdint.h>
+#include <sys/socket.h>
+#include "test_nlattr.h"
+#include <linux/ip.h>
+#include <linux/rtnetlink.h>
+
+static void
+init_rtmsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
+{
+	SET_STRUCT(struct nlmsghdr, nlh,
+		.nlmsg_len = msg_len,
+		.nlmsg_type = RTM_GETROUTE,
+		.nlmsg_flags = NLM_F_DUMP
+	);
+
+	struct rtmsg *const msg = NLMSG_DATA(nlh);
+	SET_STRUCT(struct rtmsg, msg,
+		.rtm_family = AF_UNIX,
+		.rtm_tos = IPTOS_LOWDELAY,
+		.rtm_table = RT_TABLE_DEFAULT,
+		.rtm_protocol = RTPROT_KERNEL,
+		.rtm_scope = RT_SCOPE_UNIVERSE,
+		.rtm_type = RTN_LOCAL,
+		.rtm_flags = RTM_F_NOTIFY
+	);
+}
+
+static void
+print_rtmsg(const unsigned int msg_len)
+{
+	printf("{len=%u, type=RTM_GETROUTE, flags=NLM_F_DUMP"
+	       ", seq=0, pid=0}, {rtm_family=AF_UNIX"
+	       ", rtm_dst_len=0, rtm_src_len=0"
+	       ", rtm_tos=IPTOS_LOWDELAY"
+	       ", rtm_table=RT_TABLE_DEFAULT"
+	       ", rtm_protocol=RTPROT_KERNEL"
+	       ", rtm_scope=RT_SCOPE_UNIVERSE"
+	       ", rtm_type=RTN_LOCAL"
+	       ", rtm_flags=RTM_F_NOTIFY}",
+	       msg_len);
+}
+
+int
+main(void)
+{
+	skip_if_unavailable("/proc/self/fd/");
+
+	const int fd = create_nl_socket(NETLINK_ROUTE);
+	const unsigned int hdrlen = sizeof(struct rtmsg);
+	void *nlh0 = tail_alloc(NLMSG_SPACE(hdrlen));
+
+	static char pattern[4096];
+	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
+
+	char nla_type_str[256];
+	sprintf(nla_type_str, "%#x /* RTA_??? */", 0xffff & NLA_TYPE_MASK);
+	TEST_NLATTR_(fd, nlh0, hdrlen,
+		     init_rtmsg, print_rtmsg,
+		     0xffff & NLA_TYPE_MASK, nla_type_str,
+		     4, pattern, 4,
+		     print_quoted_hex(pattern, 4));
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
diff --git a/tests/pure_executables.list b/tests/pure_executables.list
index 45b259a..02c3e6e 100755
--- a/tests/pure_executables.list
+++ b/tests/pure_executables.list
@@ -189,6 +189,7 @@ nlattr_inet_diag_req_v2
 nlattr_netlink_diag_msg
 nlattr_nlmsgerr
 nlattr_packet_diag_msg
+nlattr_rtmsg
 nlattr_smc_diag_msg
 nlattr_unix_diag_msg
 old_mmap
-- 
2.7.4