[PATCH v5 3/4] tests: check decoding of netlink protocol
Fabien Siron
fabien.siron at epita.fr
Mon Jun 20 16:06:44 UTC 2016
* tests/netlink_parsing.test: New test.
* tests/netlink_parsing.c: New file.
* tests/.gitignore: Add netlink_parsing.
* tests/Makefile.am (check_PROGRAMS): Likewise.
---
tests/.gitignore | 1 +
tests/Makefile.am | 2 +
tests/netlink_parsing.c | 119 +++++++++++++++++++++++++++++++++++++++++++++
tests/netlink_parsing.test | 43 ++++++++++++++++
4 files changed, 165 insertions(+)
create mode 100644 tests/netlink_parsing.c
create mode 100755 tests/netlink_parsing.test
diff --git a/tests/.gitignore b/tests/.gitignore
index 72e93d8..7c0cf95 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -147,6 +147,7 @@ net-yy-netlink
net-yy-unix
netlink_inet_diag
netlink_netlink_diag
+netlink_parsing
netlink_unix_diag
newfstatat
nsyscalls
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 94d3d23..65e0893 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -201,6 +201,7 @@ check_PROGRAMS = \
net-yy-unix \
netlink_inet_diag \
netlink_netlink_diag \
+ netlink_parsing \
netlink_unix_diag \
newfstatat \
nsyscalls \
@@ -510,6 +511,7 @@ DECODER_TESTS = \
net-yy-netlink.test \
net-yy-unix.test \
net.test \
+ netlink_parsing.test \
newfstatat.test \
nsyscalls.test \
old_mmap.test \
diff --git a/tests/netlink_parsing.c b/tests/netlink_parsing.c
new file mode 100644
index 0000000..3e7c983
--- /dev/null
+++ b/tests/netlink_parsing.c
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2014-2016 Dmitry V. Levin <ldv at altlinux.org>
+ * Copyright (c) 2016 Fabien Siron <fabien.siron at epita.fr>
+ * 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 <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <linux/netlink.h>
+#include <linux/sock_diag.h>
+#include <linux/netlink_diag.h>
+
+#if !defined NETLINK_SOCK_DIAG && defined NETLINK_INET_DIAG
+# define NETLINK_SOCK_DIAG NETLINK_INET_DIAG
+#endif
+
+static void
+send_query(const int fd)
+{
+ struct {
+ struct nlmsghdr nlh;
+ char magic[4];
+ } req = {
+ .nlh = {
+ .nlmsg_len = sizeof(req),
+ .nlmsg_type = NLMSG_NOOP,
+ .nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST
+ },
+ .magic = "abcd"
+ };
+
+ const void *const efault = tail_alloc(sizeof(struct nlmsghdr) - 1);
+
+ if (sendto(fd, &req, sizeof(req), MSG_DONTWAIT, NULL, 0) !=
+ (unsigned) sizeof(req))
+ perror_msg_and_skip("sendto");
+
+ printf("sendto(%d, {{len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x"
+ ", seq=0, pid=0}, \"abcd\"}, %u, MSG_DONTWAIT, NULL, 0) = %u\n",
+ fd, (unsigned) sizeof(req), NLM_F_DUMP,
+ (unsigned) sizeof(req), (unsigned) sizeof(req));
+
+ /* data length is equal to sizeof(struct nlmsghdr) */
+ req.nlh.nlmsg_len = sizeof(req.nlh);
+
+ if (sendto(fd, &req.nlh, sizeof(req.nlh), MSG_DONTWAIT, NULL, 0) !=
+ (unsigned) sizeof(req.nlh))
+ perror_msg_and_skip("sendto");
+
+ printf("sendto(%d, {{len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x"
+ ", seq=0, pid=0}}, %u, MSG_DONTWAIT, NULL, 0) = %u\n",
+ fd, (unsigned) sizeof(req.nlh), NLM_F_DUMP,
+ (unsigned) sizeof(req.nlh), (unsigned) sizeof(req.nlh));
+
+ /* data length is less than sizeof(struct nlmsghdr) */
+ if (sendto(fd, &req.magic, sizeof(req.magic), MSG_DONTWAIT, NULL, 0) !=
+ (unsigned) sizeof(req.magic))
+ perror_msg_and_skip("sendto");
+
+ printf("sendto(%d, \"abcd\", %u, MSG_DONTWAIT, NULL, 0) = %u\n",
+ fd, (unsigned) sizeof(req.magic), (unsigned) sizeof(req.magic));
+
+ sendto(fd, efault, sizeof(struct nlmsghdr), MSG_DONTWAIT, NULL, 0);
+
+ printf("sendto(%d, %p, %u, MSG_DONTWAIT, NULL, 0) = -1 "
+ "EFAULT (%m)\n", fd, efault, (unsigned) sizeof(struct nlmsghdr));
+}
+
+int main(void)
+{
+ struct sockaddr_nl addr;
+ socklen_t len = sizeof(addr);
+ int fd;
+
+ memset(&addr, 0, sizeof(addr));
+ addr.nl_family = AF_NETLINK;
+
+ if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG)) == -1)
+ perror_msg_and_skip("socket AF_NETLINK");
+
+ printf("socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG) = %d\n",
+ fd);
+ if (bind(fd, (struct sockaddr *) &addr, len))
+ perror_msg_and_skip("bind");
+ printf("bind(%d, {sa_family=AF_NETLINK, pid=0, groups=00000000}, %u)"
+ " = 0\n", fd, len);
+
+ send_query(fd);
+
+ printf("+++ exited with 0 +++\n");
+
+ return 0;
+}
diff --git a/tests/netlink_parsing.test b/tests/netlink_parsing.test
new file mode 100755
index 0000000..c8313d1
--- /dev/null
+++ b/tests/netlink_parsing.test
@@ -0,0 +1,43 @@
+#!/bin/sh
+#
+# Check decoding of Netlink parsing.
+#
+# Copyright (c) 2014 Masatake YAMATO <yamato at redhat.com>
+# Copyright (c) 2014-2016 Dmitry V. Levin <ldv at altlinux.org>
+# Copyright (c) 2016 Fabien Siron <fabien.siron at epita.fr>
+# 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.
+
+. "${srcdir=.}/init.sh"
+
+check_prog sed
+
+run_prog "./$NAME" > /dev/null
+
+run_strace -a22 -v -eclose,network $args > "$EXP"
+# Filter out close() calls made by ld.so and libc.
+sed -n '/socket/,$p' < "$LOG" > "$OUT"
+
+match_diff "$OUT" "$EXP"
+rm -f "$EXP" "$OUT"
--
2.8.3
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