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

   1 /*
   2  * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
   3  * Copyright (c) 2017-2018 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 <string.h>
  13 #include <stdint.h>
  14 #include "test_nlattr.h"
  15 #include <linux/netlink_diag.h>
  16 #include <linux/sock_diag.h>
  17
  18 static void
  19 init_netlink_diag_msg(struct nlmsghdr *const nlh, const unsigned int msg_len)
  20 {
  21         SET_STRUCT(struct nlmsghdr, nlh,
  22                 .nlmsg_len = msg_len,
  23                 .nlmsg_type = SOCK_DIAG_BY_FAMILY,
  24                 .nlmsg_flags = NLM_F_DUMP
  25         );
  26
  27         struct netlink_diag_msg *const msg = NLMSG_DATA(nlh);
  28         SET_STRUCT(struct netlink_diag_msg, msg,
  29                 .ndiag_family = AF_NETLINK,
  30                 .ndiag_type = SOCK_RAW,
  31                 .ndiag_protocol = NETLINK_ROUTE,
  32                 .ndiag_state = NETLINK_CONNECTED
  33         );
  34 }
  35
  36 static void
  37 print_netlink_diag_msg(const unsigned int msg_len)
  38 {
  39         printf("{len=%u, type=SOCK_DIAG_BY_FAMILY"
  40                ", flags=NLM_F_DUMP, seq=0, pid=0}, {ndiag_family=AF_NETLINK"
  41                ", ndiag_type=SOCK_RAW, ndiag_protocol=NETLINK_ROUTE"
  42                ", ndiag_state=NETLINK_CONNECTED, ndiag_portid=0"
  43                ", ndiag_dst_portid=0, ndiag_dst_group=0, ndiag_ino=0"
  44                ", ndiag_cookie=[0, 0]}",
  45                msg_len);
  46 }
  47
  48 static void
  49 print_xlong(const unsigned long *p, size_t i)
  50 {
  51         printf("%#lx", *p);
  52 }
  53
  54 int
  55 main(void)
  56 {
  57         skip_if_unavailable("/proc/self/fd/");
  58
  59         static const unsigned long groups[] = {
  60                 (unsigned long) 0xdeadbeefbadc0dedULL,
  61                 (unsigned long) 0xdeadbeefbadc0dedULL
  62         };
  63         static const struct netlink_diag_ring ndr = {
  64                 .ndr_block_size = 0xfabfabdc,
  65                 .ndr_block_nr = 0xabcdabda,
  66                 .ndr_frame_size = 0xcbadbafa,
  67                 .ndr_frame_nr = 0xdbcafadb
  68         };
  69         static const uint32_t flags =
  70                 NDIAG_FLAG_CB_RUNNING | NDIAG_FLAG_PKTINFO;
  71
  72         const int fd = create_nl_socket(NETLINK_SOCK_DIAG);
  73         const unsigned int hdrlen = sizeof(struct netlink_diag_msg);
  74         void *const nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen),
  75                                          NLA_HDRLEN +
  76                                          MAX(sizeof(groups), sizeof(ndr)));
  77
  78         static char pattern[4096];
  79         fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
  80
  81         TEST_NLATTR_ARRAY(fd, nlh0, hdrlen,
  82                           init_netlink_diag_msg, print_netlink_diag_msg,
  83                           NETLINK_DIAG_GROUPS, pattern, groups, print_xlong);
  84
  85         TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
  86                            init_netlink_diag_msg, print_netlink_diag_msg,
  87                            NETLINK_DIAG_RX_RING, pattern, ndr,
  88                            PRINT_FIELD_U("{", ndr, ndr_block_size);
  89                            PRINT_FIELD_U(", ", ndr, ndr_block_nr);
  90                            PRINT_FIELD_U(", ", ndr, ndr_frame_size);
  91                            PRINT_FIELD_U(", ", ndr, ndr_frame_nr);
  92                            printf("}"));
  93
  94         TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
  95                            init_netlink_diag_msg, print_netlink_diag_msg,
  96                            NETLINK_DIAG_FLAGS, pattern, flags,
  97                            printf("NDIAG_FLAG_CB_RUNNING|NDIAG_FLAG_PKTINFO"));
  98
  99         puts("+++ exited with 0 +++");
 100         return 0;
 101 }