[PATCH 3/4] tests: check decoding of MDBA_MDB_ENTRY_INFO netlink attributes

JingPiao Chen chenjingpiao at gmail.com
Sun Sep 10 02:37:06 UTC 2017


* tests/nlattr_mdba_mdb_entry.c: New file.
* tests/gen_tests.in (nlattr_mdba_mdb_entry): New entry.
* tests/pure_executables.list: Add nlattr_mdba_mdb_entry.
* tests/.gitignore: Likewise.
---
 tests/.gitignore              |   1 +
 tests/gen_tests.in            |   1 +
 tests/nlattr_mdba_mdb_entry.c | 231 ++++++++++++++++++++++++++++++++++++++++++
 tests/pure_executables.list   |   1 +
 4 files changed, 234 insertions(+)
 create mode 100644 tests/nlattr_mdba_mdb_entry.c

diff --git a/tests/.gitignore b/tests/.gitignore
index 982a9fc..7eb818a 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -231,6 +231,7 @@ nlattr_ifla_xdp
 nlattr_inet_diag_msg
 nlattr_inet_diag_req_compat
 nlattr_inet_diag_req_v2
+nlattr_mdba_mdb_entry
 nlattr_ndmsg
 nlattr_ndtmsg
 nlattr_netconfmsg
diff --git a/tests/gen_tests.in b/tests/gen_tests.in
index a028078..c494cea 100644
--- a/tests/gen_tests.in
+++ b/tests/gen_tests.in
@@ -210,6 +210,7 @@ nlattr_ifla_xdp			+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
+nlattr_mdba_mdb_entry		+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_mdb_entry.c b/tests/nlattr_mdba_mdb_entry.c
new file mode 100644
index 0000000..e333fa9
--- /dev/null
+++ b/tests/nlattr_mdba_mdb_entry.c
@@ -0,0 +1,231 @@
+/*
+ * 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 <arpa/inet.h>
+# include <linux/if_bridge.h>
+# include <linux/rtnetlink.h>
+
+# ifndef MDB_TEMPORARY
+#  define MDB_TEMPORARY 0
+# endif
+# ifndef MDBA_MDB_ENTRY_INFO
+#  define MDBA_MDB_ENTRY_INFO 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)
+{
+	unsigned int len = msg_len;
+
+	SET_STRUCT(struct nlmsghdr, nlh,
+		.nlmsg_len = 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));
+	len -= NLMSG_SPACE(hdrlen);
+	SET_STRUCT(struct nlattr, nla,
+		.nla_len = len,
+		.nla_type = MDBA_MDB
+	);
+
+	nla = nla + 1;
+	len -= NLA_HDRLEN;
+	SET_STRUCT(struct nlattr, nla,
+		.nla_len = len,
+		.nla_type = MDBA_MDB_ENTRY
+	);
+}
+
+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_MDB}"
+	       ", {{nla_len=%u, nla_type=MDBA_MDB_ENTRY}",
+	       msg_len, msg_len - NLMSG_SPACE(hdrlen),
+	       msg_len - NLMSG_SPACE(hdrlen) - NLA_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 unsigned int nla_type = 0xffff & NLA_TYPE_MASK;
+	char nla_type_str[256];
+	sprintf(nla_type_str, "%#x /* MDBA_MDB_ENTRY_??? */", nla_type);
+	TEST_NLATTR_(fd, nlh0 - NLA_HDRLEN * 2, hdrlen + NLA_HDRLEN * 2,
+		     init_br_port_msg, print_br_port_msg,
+		     nla_type, nla_type_str,
+		     4, pattern, 4,
+		     print_quoted_hex(pattern, 4);
+		     printf("}}"));
+
+# ifdef HAVE_STRUCT_BR_MDB_ENTRY
+	struct br_mdb_entry entry = {
+		.ifindex = ifindex_lo(),
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_STATE
+		.state = MDB_TEMPORARY,
+#  endif
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_FLAGS
+		.flags = MDB_FLAGS_OFFLOAD,
+#  endif
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_VID
+		.vid = 0xcdef,
+#  endif
+	};
+
+	entry.addr.proto = htons(AF_UNSPEC);
+	memcpy(&entry.addr.u, pattern, sizeof(entry.addr.u));
+	TEST_NESTED_NLATTR_OBJECT_EX(fd, nlh0, hdrlen,
+				     init_br_port_msg, print_br_port_msg,
+				     MDBA_MDB_ENTRY_INFO, pattern, entry, 2,
+				     printf("{ifindex=" IFINDEX_LO_STR);
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_STATE
+				     printf(", state=MDB_TEMPORARY");
+#  endif
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_FLAGS
+				     printf(", flags=MDB_FLAGS_OFFLOAD");
+#  endif
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_VID
+				     PRINT_FIELD_U(", ", entry, vid);
+#  endif
+				     printf(", addr={u=");
+				     print_quoted_hex(&entry.addr.u,
+						      sizeof(entry.addr.u));
+				     printf(", proto=htons(AF_UNSPEC)}}"));
+
+	const char addr4[] = "12.34.56.78";
+	entry.addr.proto = htons(AF_INET);
+
+	if (!inet_pton(AF_INET, addr4, &entry.addr.u))
+		perror_msg_and_skip("inet_pton");
+
+	TEST_NESTED_NLATTR_OBJECT_EX(fd, nlh0, hdrlen,
+				     init_br_port_msg, print_br_port_msg,
+				     MDBA_MDB_ENTRY_INFO, pattern, entry, 2,
+				     printf("{ifindex=" IFINDEX_LO_STR);
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_STATE
+				     printf(", state=MDB_TEMPORARY");
+#  endif
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_FLAGS
+				     printf(", flags=MDB_FLAGS_OFFLOAD");
+#  endif
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_VID
+				     PRINT_FIELD_U(", ", entry, vid);
+#  endif
+				     printf(", addr={ip4=inet_addr(\"%s\")"
+					    ", proto=htons(AF_INET)}}",
+					    addr4));
+
+	const char addr6[] = "12:34:56:78:90:ab:cd:ef";
+	entry.addr.proto = htons(AF_INET6);
+
+	if (!inet_pton(AF_INET6, addr6, &entry.addr.u))
+		perror_msg_and_skip("inet_pton");
+
+	TEST_NESTED_NLATTR_OBJECT_EX(fd, nlh0, hdrlen,
+				     init_br_port_msg, print_br_port_msg,
+				     MDBA_MDB_ENTRY_INFO, pattern, entry, 2,
+				     printf("{ifindex=" IFINDEX_LO_STR);
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_STATE
+				     printf(", state=MDB_TEMPORARY");
+#  endif
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_FLAGS
+				     printf(", flags=MDB_FLAGS_OFFLOAD");
+#  endif
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_VID
+				     PRINT_FIELD_U(", ", entry, vid);
+#  endif
+				     printf(", addr={inet_pton(AF_INET6, \"%s\", &ip6)"
+					    ", proto=htons(AF_INET6)}}",
+					    addr6));
+
+	static const struct nlattr nla = {
+		.nla_len = sizeof(nla),
+		.nla_type = MDBA_MDB_EATTR_TIMER
+	};
+	char buf[NLMSG_ALIGN(sizeof(entry)) + sizeof(nla)];
+	memcpy(buf, &entry, sizeof(entry));
+	memcpy(buf + NLMSG_ALIGN(sizeof(entry)), &nla, sizeof(nla));
+	TEST_NLATTR(fd, nlh0 - NLA_HDRLEN * 2, hdrlen + NLA_HDRLEN * 2,
+		    init_br_port_msg, print_br_port_msg,
+		    MDBA_MDB_ENTRY_INFO, sizeof(buf), buf, sizeof(buf),
+		    printf("{ifindex=" IFINDEX_LO_STR);
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_STATE
+		    printf(", state=MDB_TEMPORARY");
+#  endif
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_FLAGS
+		    printf(", flags=MDB_FLAGS_OFFLOAD");
+#  endif
+#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_VID
+		    PRINT_FIELD_U(", ", entry, vid);
+#  endif
+		    printf(", addr={inet_pton(AF_INET6, \"%s\", &ip6)"
+			   ", proto=htons(AF_INET6)}}"
+			   ", {nla_len=%u, nla_type=MDBA_MDB_EATTR_TIMER}}}",
+			   addr6, nla.nla_len));
+# endif /* HAVE_STRUCT_BR_MDB_ENTRY */
+
+	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 3fcb551..1ba1e19 100755
--- a/tests/pure_executables.list
+++ b/tests/pure_executables.list
@@ -193,6 +193,7 @@ nlattr_ifla_xdp
 nlattr_inet_diag_msg
 nlattr_inet_diag_req_compat
 nlattr_inet_diag_req_v2
+nlattr_mdba_mdb_entry
 nlattr_ndmsg
 nlattr_ndtmsg
 nlattr_netconfmsg
-- 
2.7.4





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