1  /*
       2   * netlink attribute ifinfomsg common code.
       3   *
       4   * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
       5   * Copyright (c) 2017-2021 The strace developers.
       6   * All rights reserved.
       7   *
       8   * SPDX-License-Identifier: GPL-2.0-or-later
       9   */
      10  
      11  #ifndef STRACE_TESTS_NLATTR_IFLA_H
      12  # define STRACE_TESTS_NLATTR_IFLA_H
      13  
      14  # include "tests.h"
      15  
      16  # ifndef IFLA_ATTR
      17  #  error "Please define IFLA_ATTR before including this file"
      18  # endif
      19  
      20  # ifndef IFLA_AF
      21  #  define IFLA_AF AF_UNIX
      22  # endif
      23  # ifndef IFLA_AF_STR
      24  #  define IFLA_AF_STR "AF_UNIX"
      25  # endif
      26  
      27  static const unsigned int hdrlen = sizeof(struct ifinfomsg);
      28  
      29  static void
      30  init_ifinfomsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
      31  {
      32  	SET_STRUCT(struct nlmsghdr, nlh,
      33  		.nlmsg_len = msg_len,
      34  		.nlmsg_type = RTM_GETLINK,
      35  		.nlmsg_flags = NLM_F_DUMP
      36  	);
      37  
      38  	struct ifinfomsg *const msg = NLMSG_DATA(nlh);
      39  	SET_STRUCT(struct ifinfomsg, msg,
      40  		.ifi_family = IFLA_AF,
      41  		.ifi_type = ARPHRD_LOOPBACK,
      42  		.ifi_index = ifindex_lo(),
      43  		.ifi_flags = IFF_UP,
      44  	);
      45  
      46  	struct nlattr *const nla = NLMSG_ATTR(nlh, sizeof(*msg));
      47  	SET_STRUCT(struct nlattr, nla,
      48  		.nla_len = msg_len - NLMSG_SPACE(hdrlen),
      49  		.nla_type = IFLA_ATTR
      50  	);
      51  }
      52  
      53  static void
      54  print_ifinfomsg(const unsigned int msg_len)
      55  {
      56  	printf("{nlmsg_len=%u, nlmsg_type=" XLAT_FMT ", nlmsg_flags=" XLAT_FMT
      57  	       ", nlmsg_seq=0, nlmsg_pid=0}, {ifi_family=" XLAT_FMT
      58  	       ", ifi_type=" XLAT_FMT ", ifi_index=" XLAT_FMT_U
      59  	       ", ifi_flags=" XLAT_FMT ", ifi_change=0}"
      60  	       ", [{nla_len=%u, nla_type=" XLAT_FMT "}",
      61  	       msg_len, XLAT_ARGS(RTM_GETLINK), XLAT_ARGS(NLM_F_DUMP),
      62  	       XLAT_SEL(IFLA_AF, IFLA_AF_STR), XLAT_ARGS(ARPHRD_LOOPBACK),
      63  	       XLAT_SEL(ifindex_lo(), IFINDEX_LO_STR), XLAT_ARGS(IFF_UP),
      64  	       msg_len - NLMSG_SPACE(hdrlen),
      65  	       XLAT_SEL(IFLA_ATTR, STRINGIFY_VAL(IFLA_ATTR)));
      66  }
      67  
      68  #endif /* STRACE_TESTS_NLATTR_IFLA_H */