tests: check decoding of IFLA_PROTINFO netlink attribute of ifinfomsg

* tests/nlattr_ifla_brport.c: New file.
* tests/gen_tests.in (nlattr_ifla_brport): New entry.
* tests/pure_executables.list: Add nlattr_ifla_brport.
* tests/.gitignore: Likewise.
* tests/test_nlattr.h (TEST_NESTED_NLATTR_OBJECT): New macro.

5 files changed, 160 insertions, 0 deletions

diff --git a/tests/.gitignore b/tests/.gitignore
index 1d696629e..6d4555d4b 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -225,6 +225,7 @@ nlattr_fib_rule_hdr
 nlattr_ifaddrlblmsg
 nlattr_ifaddrmsg
 nlattr_ifinfomsg
+nlattr_ifla_brport
 nlattr_inet_diag_msg
 nlattr_inet_diag_req_compat
 nlattr_inet_diag_req_v2
diff --git a/tests/gen_tests.in b/tests/gen_tests.in
index ba156c305..1a9605b5a 100644
--- a/tests/gen_tests.in
+++ b/tests/gen_tests.in
@@ -204,6 +204,7 @@ nlattr_fib_rule_hdr		+netlink_sock_diag.test
 nlattr_ifaddrlblmsg		+netlink_sock_diag.test
 nlattr_ifaddrmsg		+netlink_sock_diag.test
 nlattr_ifinfomsg		+netlink_sock_diag.test
+nlattr_ifla_brport		+netlink_sock_diag.test
 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
diff --git a/tests/nlattr_ifla_brport.c b/tests/nlattr_ifla_brport.c
new file mode 100644
index 000000000..ae7c9da98
--- /dev/null
+++ b/tests/nlattr_ifla_brport.c
@@ -0,0 +1,122 @@
+/*
+ * 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 <inttypes.h>
+#include "test_nlattr.h"
+#include <linux/if.h>
+#include <linux/if_arp.h>
+#ifdef HAVE_LINUX_IF_LINK_H
+# include <linux/if_link.h>
+#endif
+#include <linux/rtnetlink.h>
+
+#define IFLA_BRPORT_PRIORITY 2
+#define IFLA_BRPORT_MESSAGE_AGE_TIMER 21
+
+const unsigned int hdrlen = sizeof(struct ifinfomsg);
+
+static void
+init_ifinfomsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
+{
+	SET_STRUCT(struct nlmsghdr, nlh,
+		.nlmsg_len = msg_len,
+		.nlmsg_type = RTM_GETLINK,
+		.nlmsg_flags = NLM_F_DUMP
+	);
+
+	struct ifinfomsg *const msg = NLMSG_DATA(nlh);
+	SET_STRUCT(struct ifinfomsg, msg,
+		.ifi_family = AF_UNIX,
+		.ifi_type = ARPHRD_LOOPBACK,
+		.ifi_index = ifindex_lo(),
+		.ifi_flags = IFF_UP,
+	);
+
+	struct nlattr *const nla = NLMSG_ATTR(nlh, sizeof(*msg));
+	SET_STRUCT(struct nlattr, nla,
+		.nla_len = msg_len - NLMSG_SPACE(hdrlen),
+		.nla_type = IFLA_PROTINFO
+	);
+}
+
+static void
+print_ifinfomsg(const unsigned int msg_len)
+{
+	printf("{len=%u, type=RTM_GETLINK, flags=NLM_F_DUMP"
+	       ", seq=0, pid=0}, {ifi_family=AF_UNIX"
+	       ", ifi_type=ARPHRD_LOOPBACK"
+	       ", ifi_index=" IFINDEX_LO_STR
+	       ", ifi_flags=IFF_UP, ifi_change=0}"
+	       ", {{nla_len=%u, nla_type=IFLA_PROTINFO}",
+	       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 uint16_t u16 = 0xabcd;
+	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
+				  init_ifinfomsg, print_ifinfomsg,
+				  IFLA_BRPORT_PRIORITY, pattern, u16,
+				  printf("%u", u16));
+
+	const uint64_t u64 = 0xabcdedeeefeafeab;
+	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
+				  init_ifinfomsg, print_ifinfomsg,
+				  IFLA_BRPORT_MESSAGE_AGE_TIMER, pattern, u64,
+				  printf("%" PRIu64, u64));
+
+#ifdef HAVE_STRUCT_IFLA_BRIDGE_ID
+	static const struct ifla_bridge_id id = {
+		.prio = { 0xab, 0xcd },
+		.addr = { 0xab, 0xcd, 0xef, 0xac, 0xbc, 0xcd }
+	};
+	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
+				  init_ifinfomsg, print_ifinfomsg,
+				  IFLA_BRPORT_ROOT_ID, pattern, id,
+				  printf("{prio=[%u, %u]"
+					 ", addr=%02x:%02x:%02x:%02x:%02x:%02x}",
+					 id.prio[0], id.prio[1],
+					 id.addr[0], id.addr[1], id.addr[2],
+					 id.addr[3], id.addr[4], id.addr[5]));
+#endif
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
diff --git a/tests/pure_executables.list b/tests/pure_executables.list
index 9ed80e25b..a3b1c8c76 100755
--- a/tests/pure_executables.list
+++ b/tests/pure_executables.list
@@ -187,6 +187,7 @@ nlattr_fib_rule_hdr
 nlattr_ifaddrlblmsg
 nlattr_ifaddrmsg
 nlattr_ifinfomsg
+nlattr_ifla_brport
 nlattr_inet_diag_msg
 nlattr_inet_diag_req_compat
 nlattr_inet_diag_req_v2
diff --git a/tests/test_nlattr.h b/tests/test_nlattr.h
index c282167b3..048d54758 100644
--- a/tests/test_nlattr.h
+++ b/tests/test_nlattr.h
@@ -202,3 +202,38 @@ print_nlattr(const unsigned int nla_len, const char *const nla_type)
 			}						\
 			printf("]"));					\
 	} while (0)
+
+#define TEST_NESTED_NLATTR_OBJECT(fd_, nlh0_, hdrlen_,			\
+				  init_msg_, print_msg_,		\
+				  nla_type_, pattern_, obj_, ...)	\
+	do {								\
+		const unsigned int plen =				\
+			sizeof(obj_) - 1 > DEFAULT_STRLEN		\
+			? DEFAULT_STRLEN : (int) sizeof(obj_) - 1;	\
+		/* len < sizeof(obj_) */				\
+		TEST_NLATTR_((fd_), (nlh0_) - NLA_HDRLEN,		\
+			(hdrlen_) + NLA_HDRLEN,				\
+			(init_msg_), (print_msg_),			\
+			(nla_type_), #nla_type_,			\
+			plen, (pattern_), plen,				\
+			print_quoted_hex((pattern_), plen);		\
+			printf("}"));					\
+		/* short read of sizeof(obj_) */			\
+		TEST_NLATTR_((fd_), (nlh0_) - NLA_HDRLEN,		\
+			(hdrlen_) + NLA_HDRLEN,				\
+			(init_msg_), (print_msg_),			\
+			(nla_type_), #nla_type_,			\
+			sizeof(obj_),					\
+			(pattern_), sizeof(obj_) - 1,			\
+			printf("%p}",					\
+			       RTA_DATA(TEST_NLATTR_nla)));		\
+		/* sizeof(obj_) */					\
+		TEST_NLATTR_((fd_), (nlh0_) - NLA_HDRLEN,		\
+			(hdrlen_) + NLA_HDRLEN,				\
+			(init_msg_), (print_msg_),			\
+			(nla_type_), #nla_type_,			\
+			sizeof(obj_),					\
+			&(obj_), sizeof(obj_),				\
+			__VA_ARGS__,					\
+			printf("}"));					\
+	} while (0)