[PATCH 4/4] tests: check decoding of MDBA_ROUTER_PORT netlink attribute

[JingPiao Chen]

* tests/nlattr_mdba_router_port.c: New file.
* tests/gen_tests.in (nlattr_mdba_router_port): New entry.
* tests/pure_executables.list: Add nlattr_mdba_router_port.
* tests/.gitignore: Likewise.
---
 tests/.gitignore                |   1 +
 tests/gen_tests.in              |   1 +
 tests/nlattr_mdba_router_port.c | 122 ++++++++++++++++++++++++++++++++++++++++
 tests/pure_executables.list     |   1 +
 4 files changed, 125 insertions(+)
 create mode 100644 tests/nlattr_mdba_router_port.c

diff --git a/tests/.gitignore b/tests/.gitignore
index 7eb818a..e8e6d89 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -232,6 +232,7 @@ nlattr_inet_diag_msg
 nlattr_inet_diag_req_compat
 nlattr_inet_diag_req_v2
 nlattr_mdba_mdb_entry
+nlattr_mdba_router_port
 nlattr_ndmsg
 nlattr_ndtmsg
 nlattr_netconfmsg
diff --git a/tests/gen_tests.in b/tests/gen_tests.in
index c494cea..50e62a0 100644
--- a/tests/gen_tests.in
+++ b/tests/gen_tests.in
@@ -211,6 +211,7 @@ nlattr_inet_diag_msg		+netlink_sock_diag.test
 nlattr_inet_diag_req_compat	+netlink_sock_diag.test
 nlattr_inet_diag_req_v2		+netlink_sock_diag.test
 nlattr_mdba_mdb_entry		+netlink_sock_diag.test
+nlattr_mdba_router_port		+netlink_sock_diag.test
 nlattr_ndmsg			+netlink_sock_diag.test
 nlattr_ndtmsg			+netlink_sock_diag.test
 nlattr_netconfmsg		+netlink_sock_diag.test
diff --git a/tests/nlattr_mdba_router_port.c b/tests/nlattr_mdba_router_port.c
new file mode 100644
index 0000000..4f546ef
--- /dev/null
+++ b/tests/nlattr_mdba_router_port.c
@@ -0,0 +1,122 @@
+/*
+ * 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"
+
+#ifdef HAVE_STRUCT_BR_PORT_MSG
+
+# include <stdio.h>
+# include "test_nlattr.h"
+# include <linux/if_bridge.h>
+# include <linux/rtnetlink.h>
+
+# ifndef MDBA_ROUTER
+#  define MDBA_ROUTER 2
+# endif
+# ifndef MDBA_ROUTER_PORT
+#  define MDBA_ROUTER_PORT 1
+# endif
+# ifndef MDBA_MDB_EATTR_TIMER
+#  define MDBA_MDB_EATTR_TIMER 1
+# endif
+
+const unsigned int hdrlen = sizeof(struct br_port_msg);
+
+static void
+init_br_port_msg(struct nlmsghdr *const nlh, const unsigned int msg_len)
+{
+	SET_STRUCT(struct nlmsghdr, nlh,
+		.nlmsg_len = msg_len,
+		.nlmsg_type = RTM_GETMDB,
+		.nlmsg_flags = NLM_F_DUMP
+	);
+
+	struct br_port_msg *const msg = NLMSG_DATA(nlh);
+	SET_STRUCT(struct br_port_msg, msg,
+		.family = AF_UNIX,
+		.ifindex = ifindex_lo()
+	);
+
+	struct nlattr *nla = NLMSG_ATTR(nlh, sizeof(*msg));
+	SET_STRUCT(struct nlattr, nla,
+		.nla_len = msg_len - NLMSG_SPACE(hdrlen),
+		.nla_type = MDBA_ROUTER
+	);
+}
+
+static void
+print_br_port_msg(const unsigned int msg_len)
+{
+	printf("{len=%u, type=RTM_GETMDB, flags=NLM_F_DUMP"
+	       ", seq=0, pid=0}, {family=AF_UNIX"
+	       ", ifindex=" IFINDEX_LO_STR "}"
+	       ", {{nla_len=%u, nla_type=MDBA_ROUTER}",
+	       msg_len, msg_len - NLMSG_SPACE(hdrlen));
+}
+
+int
+main(void)
+{
+	skip_if_unavailable("/proc/self/fd/");
+
+	const int fd = create_nl_socket(NETLINK_ROUTE);
+
+	void *nlh0 = tail_alloc(NLMSG_SPACE(hdrlen));
+
+	static char pattern[4096];
+	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
+
+	const uint32_t ifindex = ifindex_lo();
+	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
+				  init_br_port_msg, print_br_port_msg,
+				  MDBA_ROUTER_PORT, pattern, ifindex,
+				  printf(IFINDEX_LO_STR));
+
+	static const struct nlattr nla = {
+		.nla_len = sizeof(nla),
+		.nla_type = MDBA_MDB_EATTR_TIMER
+	};
+	char buf[NLMSG_ALIGN(ifindex) + sizeof(nla)];
+	memcpy(buf, &ifindex, sizeof(ifindex));
+	memcpy(buf + NLMSG_ALIGN(ifindex), &nla, sizeof(nla));
+	TEST_NLATTR(fd, nlh0 - NLA_HDRLEN, hdrlen + NLA_HDRLEN,
+		    init_br_port_msg, print_br_port_msg,
+		    MDBA_ROUTER_PORT, sizeof(buf), buf, sizeof(buf),
+		    printf(IFINDEX_LO_STR
+			   ", {nla_len=%u, nla_type=MDBA_MDB_EATTR_TIMER}}",
+			   nla.nla_len));
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("HAVE_STRUCT_BR_PORT_MSG")
+
+#endif
diff --git a/tests/pure_executables.list b/tests/pure_executables.list
index 1ba1e19..8210c91 100755
--- a/tests/pure_executables.list
+++ b/tests/pure_executables.list
@@ -194,6 +194,7 @@ nlattr_inet_diag_msg
 nlattr_inet_diag_req_compat
 nlattr_inet_diag_req_v2
 nlattr_mdba_mdb_entry
+nlattr_mdba_router_port
 nlattr_ndmsg
 nlattr_ndtmsg
 nlattr_netconfmsg
-- 
2.7.4