/*
 * 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_GNET_STATS_BASIC

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

const unsigned int hdrlen = sizeof(struct tcmsg);

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

	struct tcmsg *const msg = NLMSG_DATA(nlh);
	SET_STRUCT(struct tcmsg, msg,
		.tcm_family = AF_UNIX,
		.tcm_ifindex = ifindex_lo()
	);

	struct nlattr *const nla = NLMSG_ATTR(nlh, sizeof(*msg));
	SET_STRUCT(struct nlattr, nla,
		.nla_len = msg_len - NLMSG_SPACE(hdrlen),
		.nla_type = TCA_STATS2
	);
}

static void
print_tcmsg(const unsigned int msg_len)
{
	printf("{len=%u, type=RTM_GETQDISC, flags=NLM_F_DUMP"
	       ", seq=0, pid=0}, {tcm_family=AF_UNIX"
	       ", tcm_ifindex=" IFINDEX_LO_STR
	       ", tcm_handle=0, tcm_parent=0, tcm_info=0}"
	       ", {{nla_len=%u, nla_type=TCA_STATS2}",
	       msg_len, msg_len - NLMSG_SPACE(hdrlen));
}

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

	const int fd = create_nl_socket(NETLINK_ROUTE);
	void *nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen), NLA_HDRLEN + 8 * 5);

	static char pattern[4096];
	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);

	static const struct gnet_stats_basic sb = {
		.bytes = 0xabcdebdafefeadeb,
		.packets = 0xbdcdeabf
	};
	char buf[offsetofend(struct gnet_stats_basic, packets)];
	memcpy(buf, &sb, sizeof(buf));
	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
				  init_tcmsg, print_tcmsg,
				  TCA_STATS_BASIC, pattern, buf,
				  PRINT_FIELD_U("{", sb, bytes);
				  PRINT_FIELD_U(", ", sb, packets);
				  printf("}"));

#ifdef HAVE_STRUCT_GNET_STATS_RATE_EST
	static const struct gnet_stats_rate_est est = {
		.bps = 0xebcdaebd,
		.pps = 0xabdceade,
	};
	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
				  init_tcmsg, print_tcmsg,
				  TCA_STATS_RATE_EST, pattern, est,
				  PRINT_FIELD_U("{", est, bps);
				  PRINT_FIELD_U(", ", est, pps);
				  printf("}"));
#endif

#ifdef HAVE_STRUCT_GNET_STATS_QUEUE
	static const struct gnet_stats_queue qstats = {
		.qlen = 0xabcdeabd,
		.backlog = 0xbcdaebad,
		.drops = 0xcdbeaedb,
		.requeues = 0xdebaefab,
		.overlimits = 0xefaebade
	};
	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
				  init_tcmsg, print_tcmsg,
				  TCA_STATS_QUEUE, pattern, qstats,
				  PRINT_FIELD_U("{", qstats, qlen);
				  PRINT_FIELD_U(", ", qstats, backlog);
				  PRINT_FIELD_U(", ", qstats, drops);
				  PRINT_FIELD_U(", ", qstats, requeues);
				  PRINT_FIELD_U(", ", qstats, overlimits);
				  printf("}"));
#endif

#ifdef HAVE_STRUCT_GNET_STATS_RATE_EST64
	static const struct gnet_stats_rate_est64 est64 = {
		.bps = 0xacbdcdefafecaebf,
		.pps = 0xcdabeabdfeabceaf
	};
	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
				  init_tcmsg, print_tcmsg,
				  TCA_STATS_RATE_EST64, pattern, est64,
				  PRINT_FIELD_U("{", est64, bps);
				  PRINT_FIELD_U(", ", est64, pps);
				  printf("}"));
#endif

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

#else

SKIP_MAIN_UNDEFINED("HAVE_STRUCT_GNET_STATS_BASIC")

#endif