granicus.if.org Git - strace/blob - tests/nlattr_ndmsg.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 <netinet/in.h>
  13 #include <arpa/inet.h>
  14 #include "test_nlattr.h"
  15 #ifdef HAVE_LINUX_NEIGHBOUR_H
  16 # include <linux/neighbour.h>
  17 #endif
  18 #include <linux/rtnetlink.h>
  19
  20 #define NDA_PORT 6
  21
  22 static void
  23 init_ndmsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
  24 {
  25         SET_STRUCT(struct nlmsghdr, nlh,
  26                 .nlmsg_len = msg_len,
  27                 .nlmsg_type = RTM_GETNEIGH,
  28                 .nlmsg_flags = NLM_F_DUMP
  29         );
  30
  31         struct ndmsg *const msg = NLMSG_DATA(nlh);
  32         SET_STRUCT(struct ndmsg, msg,
  33                 .ndm_family = AF_UNIX,
  34                 .ndm_ifindex = ifindex_lo(),
  35                 .ndm_state = NUD_PERMANENT,
  36                 .ndm_flags = NTF_PROXY,
  37                 .ndm_type = RTN_UNSPEC
  38         );
  39 }
  40
  41 static void
  42 print_ndmsg(const unsigned int msg_len)
  43 {
  44         printf("{len=%u, type=RTM_GETNEIGH, flags=NLM_F_DUMP"
  45                ", seq=0, pid=0}, {ndm_family=AF_UNIX"
  46                ", ndm_ifindex=" IFINDEX_LO_STR
  47                ", ndm_state=NUD_PERMANENT"
  48                ", ndm_flags=NTF_PROXY"
  49                ", ndm_type=RTN_UNSPEC}",
  50                msg_len);
  51 }
  52
  53 int
  54 main(void)
  55 {
  56         skip_if_unavailable("/proc/self/fd/");
  57
  58         const int fd = create_nl_socket(NETLINK_ROUTE);
  59         const unsigned int hdrlen = sizeof(struct ndmsg);
  60         void *nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen),
  61                                    NLA_HDRLEN + sizeof(struct nda_cacheinfo));
  62
  63         static char pattern[4096];
  64         fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
  65
  66         const unsigned int nla_type = 0xffff & NLA_TYPE_MASK;
  67         char nla_type_str[256];
  68         sprintf(nla_type_str, "%#x /* NDA_??? */", nla_type);
  69         TEST_NLATTR_(fd, nlh0, hdrlen,
  70                      init_ndmsg, print_ndmsg,
  71                      nla_type, nla_type_str,
  72                      4, pattern, 4,
  73                      print_quoted_hex(pattern, 4));
  74
  75         TEST_NLATTR(fd, nlh0, hdrlen,
  76                     init_ndmsg, print_ndmsg,
  77                     NDA_DST, 4, pattern, 4,
  78                     print_quoted_hex(pattern, 4));
  79
  80         static const struct nda_cacheinfo ci = {
  81                 .ndm_confirmed = 0xabcdedad,
  82                 .ndm_used = 0xbcdaedad,
  83                 .ndm_updated = 0xcdbadeda,
  84                 .ndm_refcnt = 0xdeadbeda
  85         };
  86
  87         TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
  88                            init_ndmsg, print_ndmsg,
  89                            NDA_CACHEINFO, pattern, ci,
  90                            PRINT_FIELD_U("{", ci, ndm_confirmed);
  91                            PRINT_FIELD_U(", ", ci, ndm_used);
  92                            PRINT_FIELD_U(", ", ci, ndm_updated);
  93                            PRINT_FIELD_U(", ", ci, ndm_refcnt);
  94                            printf("}"));
  95
  96         const uint16_t port = 0xabcd;
  97         TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
  98                            init_ndmsg, print_ndmsg,
  99                            NDA_PORT, pattern, port,
 100                            printf("htons(%u)", ntohs(port)));
 101
 102         puts("+++ exited with 0 +++");
 103         return 0;
 104 }