tests: check decoding of NETLINK_ROUTE rtgenmsg attributes

* tests/nlattr_rtgenmsg.c: New file.
* tests/gen_tests.in (nlattr_rtgenmsg): New entry.
* tests/pure_executables.list: Add nlattr_rtgenmsg.
* tests/.gitignore: Likewise.

1 files changed, 91 insertions, 0 deletions

diff --git a/tests/nlattr_rtgenmsg.c b/tests/nlattr_rtgenmsg.c
new file mode 100644
index 000000000..ceb061df1
--- /dev/null
+++ b/tests/nlattr_rtgenmsg.c
@@ -0,0 +1,91 @@
+/*
+ * 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"
+
+#include <stdio.h>
+#include "netlink.h"
+#include <linux/rtnetlink.h>
+
+#ifdef RTM_GETNSID
+
+# include "test_nlattr.h"
+
+static void
+init_rtgenmsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
+{
+	SET_STRUCT(struct nlmsghdr, nlh,
+		.nlmsg_len = msg_len,
+		.nlmsg_type = RTM_GETNSID,
+		.nlmsg_flags = NLM_F_DUMP
+	);
+
+	struct rtgenmsg *const msg = NLMSG_DATA(nlh);
+	SET_STRUCT(struct rtgenmsg, msg,
+		.rtgen_family = AF_UNIX
+	);
+}
+
+static void
+print_rtgenmsg(const unsigned int msg_len)
+{
+	printf("{len=%u, type=RTM_GETNSID, flags=NLM_F_DUMP"
+	       ", seq=0, pid=0}, {rtgen_family=AF_UNIX}",
+	       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 rtgenmsg);
+	void *nlh0 = tail_alloc(NLMSG_SPACE(hdrlen));
+
+	static char pattern[4096];
+	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
+
+	const unsigned int nla_type = 0xffff & NLA_TYPE_MASK;
+	char nla_type_str[256];
+	sprintf(nla_type_str, "%#x /* NETNSA_??? */", nla_type);
+	TEST_NLATTR_(fd, nlh0, hdrlen,
+		     init_rtgenmsg, print_rtgenmsg,
+		     nla_type, nla_type_str,
+		     4, pattern, 4,
+		     print_quoted_hex(pattern, 4));
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("RTM_GETNSID")
+
+#endif