--- /dev/null
+/*
+ * Check decoding of netlink protocol.
+ *
+ * Copyright (c) 2014-2016 Dmitry V. Levin <ldv@altlinux.org>
+ * Copyright (c) 2016 Fabien Siron <fabien.siron@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 <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, nl_pid=0, nl_groups=00000000}"
+ ", %u) = 0\n", fd, len);
+
+ send_query(fd);
+
+ printf("+++ exited with 0 +++\n");
+
+ return 0;
+}
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