[PATCH v5 2/8] tests: check decoding of nlattr_inet_diag_req_compat attributes

[JingPiao Chen]

* tests/nlattr_inet_diag_req_compat.c: New file.
* tests/gen_tests.in (nlattr_inet_diag_req_compat): New entry.
* tests/pure_executables.list: Add nlattr_inet_diag_req_compat.
* tests/.gitignore: Likewise.
---
 tests/.gitignore                    |   1 +
 tests/gen_tests.in                  |   1 +
 tests/nlattr_inet_diag_req_compat.c | 111 ++++++++++++++++++++++++++++++++++++
 tests/pure_executables.list         |   1 +
 4 files changed, 114 insertions(+)
 create mode 100644 tests/nlattr_inet_diag_req_compat.c

diff --git a/tests/.gitignore b/tests/.gitignore
index 4c3d41a..318889e 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -212,6 +212,7 @@ netlink_xfrm
 newfstatat
 nlattr
 nlattr_inet_diag_msg
+nlattr_inet_diag_req_compat
 nlattr_netlink_diag_msg
 nlattr_packet_diag_msg
 nlattr_smc_diag_msg
diff --git a/tests/gen_tests.in b/tests/gen_tests.in
index 8e15121..dfeec06 100644
--- a/tests/gen_tests.in
+++ b/tests/gen_tests.in
@@ -195,6 +195,7 @@ netlink_xfrm	+netlink_sock_diag.test
 newfstatat	-a32 -v -P stat.sample -P /dev/full
 nlattr		+netlink_sock_diag.test
 nlattr_inet_diag_msg		+netlink_sock_diag.test
+nlattr_inet_diag_req_compat	+netlink_sock_diag.test
 nlattr_netlink_diag_msg		+netlink_sock_diag.test
 nlattr_packet_diag_msg		+netlink_sock_diag-v.sh
 nlattr_smc_diag_msg		+netlink_sock_diag.test
diff --git a/tests/nlattr_inet_diag_req_compat.c b/tests/nlattr_inet_diag_req_compat.c
new file mode 100644
index 0000000..b98b32c
--- /dev/null
+++ b/tests/nlattr_inet_diag_req_compat.c
@@ -0,0 +1,111 @@
+/*
+ * 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 <string.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <netinet/tcp.h>
+#include "test_nlattr.h"
+#include <linux/inet_diag.h>
+#include <linux/rtnetlink.h>
+#include <linux/sock_diag.h>
+
+static const char address[] = "10.11.12.13";
+
+#ifdef HAVE_IF_INDEXTONAME
+# define IFINDEX_LO	(if_nametoindex("lo"))
+#else
+# define IFINDEX_LO	1
+#endif
+
+static void
+init_inet_diag_req(struct nlmsghdr *nlh, unsigned int msg_len)
+{
+	SET_STRUCT(struct nlmsghdr, nlh,
+		.nlmsg_len = msg_len,
+		.nlmsg_type = TCPDIAG_GETSOCK,
+		.nlmsg_flags = NLM_F_REQUEST
+	);
+
+	struct inet_diag_req *req = NLMSG_DATA(nlh);
+	SET_STRUCT(struct inet_diag_req, req,
+		.idiag_family = AF_INET,
+		.idiag_ext = 1 << (INET_DIAG_TOS - 1),
+		.idiag_states = 1 << TCP_LAST_ACK,
+		.id.idiag_if = IFINDEX_LO
+	);
+
+	if (!inet_pton(AF_INET, address, req->id.idiag_src) ||
+	    !inet_pton(AF_INET, address, req->id.idiag_dst))
+		perror_msg_and_skip("inet_pton");
+}
+
+static void
+print_inet_diag_req(const unsigned int msg_len)
+{
+	printf("{len=%u, type=TCPDIAG_GETSOCK"
+	       ", flags=NLM_F_REQUEST, seq=0, pid=0}"
+	       ", {idiag_family=AF_INET, idiag_src_len=0"
+	       ", idiag_dst_len=0, idiag_ext=1<<(INET_DIAG_TOS-1)"
+	       ", id={idiag_sport=htons(0), idiag_dport=htons(0)"
+	       ", idiag_src=inet_addr(\"%s\")"
+	       ", idiag_dst=inet_addr(\"%s\")"
+	       ", idiag_if=if_nametoindex(\"lo\")"
+	       ", idiag_cookie=[0, 0]}"
+	       ", idiag_states=1<<TCP_LAST_ACK, idiag_dbs=0}",
+	       msg_len, address, address);
+}
+
+int
+main(void)
+{
+	skip_if_unavailable("/proc/self/fd/");
+
+	int fd = create_nl_socket(NETLINK_SOCK_DIAG);
+	const unsigned int hdrlen = sizeof(struct inet_diag_req);
+	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 /* INET_DIAG_REQ_??? */",
+		INET_DIAG_REQ_BYTECODE + 1);
+	TEST_NLATTR_(fd, nlh0, hdrlen,
+		     init_inet_diag_req, print_inet_diag_req,
+		     INET_DIAG_REQ_BYTECODE + 1, nla_type_str,
+		     4, pattern, 4,
+		     print_quoted_hex(pattern, 4));
+
+	printf("+++ exited with 0 +++\n");
+	return 0;
+}
diff --git a/tests/pure_executables.list b/tests/pure_executables.list
index 68245c5..7a620d4 100755
--- a/tests/pure_executables.list
+++ b/tests/pure_executables.list
@@ -177,6 +177,7 @@ netlink_xfrm
 newfstatat
 nlattr
 nlattr_inet_diag_msg
+nlattr_inet_diag_req_compat
 nlattr_netlink_diag_msg
 nlattr_packet_diag_msg
 nlattr_smc_diag_msg
-- 
2.7.4