strace/tests/nlattr_dcbmsg.c

/*
 * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
 * Copyright (c) 2017-2018 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_DCBMSG

# include <stdio.h>
# include "test_nlattr.h"
# include <linux/dcbnl.h>
# include <linux/rtnetlink.h>

static void
init_dcbmsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
{
	SET_STRUCT(struct nlmsghdr, nlh,
		.nlmsg_len = msg_len,
		.nlmsg_type = RTM_GETDCB,
		.nlmsg_flags = NLM_F_DUMP
	);

	struct dcbmsg *const msg = NLMSG_DATA(nlh);
	SET_STRUCT(struct dcbmsg, msg,
		.dcb_family = AF_UNIX,
		.cmd = DCB_CMD_UNDEFINED
	);
}

static void
print_dcbmsg(const unsigned int msg_len)
{
	printf("{len=%u, type=RTM_GETDCB, flags=NLM_F_DUMP"
	       ", seq=0, pid=0}, {dcb_family=AF_UNIX"
	       ", cmd=DCB_CMD_UNDEFINED}",
	       msg_len);
}

int
main(void)
{
	skip_if_unavailable("/proc/self/fd/");

	const int fd = create_nl_socket(NETLINK_ROUTE);
	const unsigned int hdrlen = sizeof(struct dcbmsg);
	void *nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen), NLA_HDRLEN + 4);

	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 /* DCB_ATTR_??? */", nla_type);
	TEST_NLATTR_(fd, nlh0, hdrlen,
		     init_dcbmsg, print_dcbmsg,
		     nla_type, nla_type_str,
		     4, pattern, 4,
		     print_quoted_hex(pattern, 4));

	puts("+++ exited with 0 +++");
	return 0;
}

#else

SKIP_MAIN_UNDEFINED("HAVE_STRUCT_DCBMSG")

#endif