granicus.if.org Git - strace/blob - tests/nlattr_tca_stab.c

   1 /*
   2  * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
   3  * Copyright (c) 2017 The strace developers.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include "tests.h"
  30
  31 #include <stdio.h>
  32 #include "test_nlattr.h"
  33 #include <linux/pkt_sched.h>
  34 #include <linux/rtnetlink.h>
  35
  36 #ifndef TCA_STAB
  37 # define TCA_STAB 8
  38 #endif
  39 #ifndef TCA_STAB_DATA
  40 # define TCA_STAB_DATA 2
  41 #endif
  42
  43 const unsigned int hdrlen = sizeof(struct tcmsg);
  44
  45 static void
  46 init_tcmsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
  47 {
  48         SET_STRUCT(struct nlmsghdr, nlh,
  49                 .nlmsg_len = msg_len,
  50                 .nlmsg_type = RTM_GETQDISC,
  51                 .nlmsg_flags = NLM_F_DUMP
  52         );
  53
  54         struct tcmsg *const msg = NLMSG_DATA(nlh);
  55         SET_STRUCT(struct tcmsg, msg,
  56                 .tcm_family = AF_UNIX,
  57                 .tcm_ifindex = ifindex_lo()
  58         );
  59
  60         struct nlattr *const nla = NLMSG_ATTR(nlh, sizeof(*msg));
  61         SET_STRUCT(struct nlattr, nla,
  62                 .nla_len = msg_len - NLMSG_SPACE(hdrlen),
  63                 .nla_type = TCA_STAB
  64         );
  65 }
  66
  67 static void
  68 print_tcmsg(const unsigned int msg_len)
  69 {
  70         printf("{len=%u, type=RTM_GETQDISC, flags=NLM_F_DUMP"
  71                ", seq=0, pid=0}, {tcm_family=AF_UNIX"
  72                ", tcm_ifindex=" IFINDEX_LO_STR
  73                ", tcm_handle=0, tcm_parent=0, tcm_info=0}"
  74                ", {{nla_len=%u, nla_type=TCA_STAB}",
  75                msg_len, msg_len - NLMSG_SPACE(hdrlen));
  76 }
  77
  78 static void
  79 print_uint16(const uint16_t *p)
  80 {
  81         printf("%u", *p);
  82 }
  83
  84 int
  85 main(void)
  86 {
  87         skip_if_unavailable("/proc/self/fd/");
  88
  89         const int fd = create_nl_socket(NETLINK_ROUTE);
  90         void *nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen), NLA_HDRLEN + 4
  91 #ifdef HAVE_STRUCT_TC_SIZESPEC
  92                         - 4 + sizeof(struct tc_sizespec)
  93 #endif
  94                         );
  95
  96         static char pattern[4096];
  97         fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
  98
  99 #ifdef HAVE_STRUCT_TC_SIZESPEC
 100         static const struct tc_sizespec s = {
 101                 .cell_log = 0xab,
 102                 .size_log = 0xcd,
 103                 .cell_align = 0xefab,
 104                 .overhead = 0xcdadeefa,
 105                 .linklayer = 0xefbaafeb,
 106                 .mpu = 0xfebfaefb,
 107                 .mtu = 0xacdbefab,
 108                 .tsize = 0xbdeaabed
 109         };
 110         TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
 111                                   init_tcmsg, print_tcmsg,
 112                                   TCA_STAB_BASE, pattern, s,
 113                                   PRINT_FIELD_U("{", s, cell_log);
 114                                   PRINT_FIELD_U(", ", s, size_log);
 115                                   PRINT_FIELD_D(", ", s, cell_align);
 116                                   PRINT_FIELD_D(", ", s, overhead);
 117                                   PRINT_FIELD_U(", ", s, linklayer);
 118                                   PRINT_FIELD_U(", ", s, mpu);
 119                                   PRINT_FIELD_U(", ", s, mtu);
 120                                   PRINT_FIELD_U(", ", s, tsize);
 121                                   printf("}"));
 122 #endif
 123
 124         uint16_t data[2] = { 0xacbd, 0xefba };
 125         TEST_NESTED_NLATTR_ARRAY(fd, nlh0, hdrlen,
 126                                  init_tcmsg, print_tcmsg,
 127                                  TCA_STAB_DATA, pattern, data, print_uint16);
 128
 129         puts("+++ exited with 0 +++");
 130         return 0;
 131 }