granicus.if.org Git - strace/blob - tests/nlattr_ifaddrmsg.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 <arpa/inet.h>
  13 #include "test_nlattr.h"
  14 #ifdef HAVE_LINUX_IF_ADDR_H
  15 # include <linux/if_addr.h>
  16 #endif
  17 #include <linux/rtnetlink.h>
  18
  19 #define IFA_FLAGS 8
  20
  21 #define SET_IFA_FAMILY(af)              \
  22         do {                            \
  23                 ifa_family = af;        \
  24                 ifa_family_str = #af;   \
  25         }                               \
  26         while (0)
  27
  28 uint8_t ifa_family;
  29 const char *ifa_family_str;
  30
  31 static void
  32 init_ifaddrmsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
  33 {
  34         SET_STRUCT(struct nlmsghdr, nlh,
  35                 .nlmsg_len = msg_len,
  36                 .nlmsg_type = RTM_GETADDR,
  37                 .nlmsg_flags = NLM_F_DUMP
  38         );
  39
  40         struct ifaddrmsg *const msg = NLMSG_DATA(nlh);
  41         SET_STRUCT(struct ifaddrmsg, msg,
  42                 .ifa_family = ifa_family,
  43                 .ifa_flags = IFA_F_SECONDARY,
  44                 .ifa_scope = RT_SCOPE_UNIVERSE,
  45                 .ifa_index = ifindex_lo()
  46         );
  47 }
  48
  49 static void
  50 print_ifaddrmsg(const unsigned int msg_len)
  51 {
  52         printf("{len=%u, type=RTM_GETADDR, flags=NLM_F_DUMP"
  53                ", seq=0, pid=0}, {ifa_family=%s"
  54                ", ifa_prefixlen=0"
  55                ", ifa_flags=IFA_F_SECONDARY"
  56                ", ifa_scope=RT_SCOPE_UNIVERSE"
  57                ", ifa_index=" IFINDEX_LO_STR "}",
  58                msg_len, ifa_family_str);
  59 }
  60
  61 int
  62 main(void)
  63 {
  64         skip_if_unavailable("/proc/self/fd/");
  65
  66         static const char address4[] = "12.34.56.78";
  67         static const char address6[] = "12:34:56:78:90:ab:cd:ef";
  68         static const struct ifa_cacheinfo ci = {
  69                 .ifa_prefered = 0xabcdefac,
  70                 .ifa_valid = 0xbcdadbca,
  71                 .cstamp = 0xcdabedba,
  72                 .tstamp = 0xdebabdac
  73         };
  74
  75         struct in_addr a4;
  76         struct in6_addr a6;
  77         const uint32_t ifa_flags = IFA_F_SECONDARY | IFA_F_PERMANENT;
  78
  79         const int fd = create_nl_socket(NETLINK_ROUTE);
  80         const unsigned int hdrlen = sizeof(struct ifaddrmsg);
  81         void *nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen),
  82                                    NLA_HDRLEN + MAX(sizeof(ci), sizeof(a6)));
  83
  84         static char pattern[4096];
  85         fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
  86
  87         SET_IFA_FAMILY(AF_UNSPEC);
  88         const unsigned int nla_type = 0xffff & NLA_TYPE_MASK;
  89         char nla_type_str[256];
  90         sprintf(nla_type_str, "%#x /* IFA_??? */", nla_type);
  91         TEST_NLATTR_(fd, nlh0, hdrlen,
  92                      init_ifaddrmsg, print_ifaddrmsg,
  93                      nla_type, nla_type_str,
  94                      4, pattern, 4,
  95                      print_quoted_hex(pattern, 4));
  96
  97         TEST_NLATTR(fd, nlh0, hdrlen,
  98                     init_ifaddrmsg, print_ifaddrmsg,
  99                     IFA_ADDRESS, 4, pattern, 4,
 100                     print_quoted_hex(pattern, 4));
 101
 102         SET_IFA_FAMILY(AF_INET);
 103
 104         if (!inet_pton(AF_INET, address4, &a4))
 105                 perror_msg_and_skip("inet_pton");
 106
 107         TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
 108                            init_ifaddrmsg, print_ifaddrmsg,
 109                            IFA_ADDRESS, pattern, a4,
 110                            printf("inet_addr(\"%s\")", address4));
 111
 112         SET_IFA_FAMILY(AF_INET6);
 113
 114         if (!inet_pton(AF_INET6, address6, &a6))
 115                 perror_msg_and_skip("inet_pton");
 116
 117         TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
 118                            init_ifaddrmsg, print_ifaddrmsg,
 119                            IFA_ADDRESS, pattern, a6,
 120                            printf("inet_pton(AF_INET6, \"%s\")", address6));
 121
 122         TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
 123                            init_ifaddrmsg, print_ifaddrmsg,
 124                            IFA_CACHEINFO, pattern, ci,
 125                            PRINT_FIELD_U("{", ci, ifa_prefered);
 126                            PRINT_FIELD_U(", ", ci, ifa_valid);
 127                            PRINT_FIELD_U(", ", ci, cstamp);
 128                            PRINT_FIELD_U(", ", ci, tstamp);
 129                            printf("}"));
 130
 131         TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
 132                            init_ifaddrmsg, print_ifaddrmsg,
 133                            IFA_FLAGS, pattern, ifa_flags,
 134                            printf("IFA_F_SECONDARY|IFA_F_PERMANENT"));
 135
 136         puts("+++ exited with 0 +++");
 137         return 0;
 138 }