1  /*
       2   * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
       3   * Copyright (c) 2017-2021 The strace developers.
       4   * All rights reserved.
       5   *
       6   * SPDX-License-Identifier: GPL-2.0-or-later
       7   */
       8  
       9  #include "tests.h"
      10  
      11  #include <stdio.h>
      12  #include "test_nlattr.h"
      13  #include <linux/if_bridge.h>
      14  #include <linux/rtnetlink.h>
      15  
      16  static void
      17  init_br_port_msg(struct nlmsghdr *const nlh, const unsigned int msg_len)
      18  {
      19  	SET_STRUCT(struct nlmsghdr, nlh,
      20  		.nlmsg_len = msg_len,
      21  		.nlmsg_type = RTM_GETMDB,
      22  		.nlmsg_flags = NLM_F_DUMP
      23  	);
      24  
      25  	struct br_port_msg *const msg = NLMSG_DATA(nlh);
      26  	SET_STRUCT(struct br_port_msg, msg,
      27  		.family = AF_UNIX,
      28  		.ifindex = ifindex_lo()
      29  	);
      30  }
      31  
      32  static void
      33  print_br_port_msg(const unsigned int msg_len)
      34  {
      35  	printf("{nlmsg_len=%u, nlmsg_type=RTM_GETMDB, nlmsg_flags=NLM_F_DUMP"
      36  	       ", nlmsg_seq=0, nlmsg_pid=0}, {family=AF_UNIX"
      37  	       ", ifindex=" IFINDEX_LO_STR "}",
      38  	       msg_len);
      39  }
      40  
      41  int
      42  main(void)
      43  {
      44  	skip_if_unavailable("/proc/self/fd/");
      45  
      46  	const int fd = create_nl_socket(NETLINK_ROUTE);
      47  
      48  	const unsigned int hdrlen = sizeof(struct br_port_msg);
      49  	void *nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen), NLA_HDRLEN + 4);
      50  
      51  	static char pattern[4096];
      52  	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
      53  
      54  	const unsigned int nla_type = 0xffff & NLA_TYPE_MASK;
      55  	char nla_type_str[256];
      56  	sprintf(nla_type_str, "%#x /* MDBA_??? */", nla_type);
      57  	TEST_NLATTR_(fd, nlh0, hdrlen,
      58  		     init_br_port_msg, print_br_port_msg,
      59  		     nla_type, nla_type_str,
      60  		     4, pattern, 4,
      61  		     print_quoted_hex(pattern, 4));
      62  
      63  	puts("+++ exited with 0 +++");
      64  	return 0;
      65  }