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  * 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 <arpa/inet.h>
  33 #include "test_nlattr.h"
  34 #ifdef HAVE_LINUX_IF_ADDR_H
  35 # include <linux/if_addr.h>
  36 #endif
  37 #include <linux/rtnetlink.h>
  38
  39 #define IFA_FLAGS 8
  40
  41 #define SET_IFA_FAMILY(af)              \
  42         do {                            \
  43                 ifa_family = af;        \
  44                 ifa_family_str = #af;   \
  45         }                               \
  46         while (0)
  47
  48 uint8_t ifa_family;
  49 const char *ifa_family_str;
  50
  51 static void
  52 init_ifaddrmsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
  53 {
  54         SET_STRUCT(struct nlmsghdr, nlh,
  55                 .nlmsg_len = msg_len,
  56                 .nlmsg_type = RTM_GETADDR,
  57                 .nlmsg_flags = NLM_F_DUMP
  58         );
  59
  60         struct ifaddrmsg *const msg = NLMSG_DATA(nlh);
  61         SET_STRUCT(struct ifaddrmsg, msg,
  62                 .ifa_family = ifa_family,
  63                 .ifa_flags = IFA_F_SECONDARY,
  64                 .ifa_scope = RT_SCOPE_UNIVERSE,
  65                 .ifa_index = ifindex_lo()
  66         );
  67 }
  68
  69 static void
  70 print_ifaddrmsg(const unsigned int msg_len)
  71 {
  72         printf("{len=%u, type=RTM_GETADDR, flags=NLM_F_DUMP"
  73                ", seq=0, pid=0}, {ifa_family=%s"
  74                ", ifa_prefixlen=0"
  75                ", ifa_flags=IFA_F_SECONDARY"
  76                ", ifa_scope=RT_SCOPE_UNIVERSE"
  77                ", ifa_index=" IFINDEX_LO_STR "}",
  78                msg_len, ifa_family_str);
  79 }
  80
  81 int
  82 main(void)
  83 {
  84         skip_if_unavailable("/proc/self/fd/");
  85
  86         static const char address4[] = "12.34.56.78";
  87         static const char address6[] = "12:34:56:78:90:ab:cd:ef";
  88         static const struct ifa_cacheinfo ci = {
  89                 .ifa_prefered = 0xabcdefac,
  90                 .ifa_valid = 0xbcdadbca,
  91                 .cstamp = 0xcdabedba,
  92                 .tstamp = 0xdebabdac
  93         };
  94
  95         struct in_addr a4;
  96         struct in6_addr a6;
  97         const uint32_t ifa_flags = IFA_F_SECONDARY | IFA_F_PERMANENT;
  98
  99         const int fd = create_nl_socket(NETLINK_ROUTE);
 100         const unsigned int hdrlen = sizeof(struct ifaddrmsg);
 101         void *nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen),
 102                                    NLA_HDRLEN + MAX(sizeof(ci), sizeof(a6)));
 103
 104         static char pattern[4096];
 105         fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
 106
 107         SET_IFA_FAMILY(AF_UNSPEC);
 108         const unsigned int nla_type = 0xffff & NLA_TYPE_MASK;
 109         char nla_type_str[256];
 110         sprintf(nla_type_str, "%#x /* IFA_??? */", nla_type);
 111         TEST_NLATTR_(fd, nlh0, hdrlen,
 112                      init_ifaddrmsg, print_ifaddrmsg,
 113                      nla_type, nla_type_str,
 114                      4, pattern, 4,
 115                      print_quoted_hex(pattern, 4));
 116
 117         TEST_NLATTR(fd, nlh0, hdrlen,
 118                     init_ifaddrmsg, print_ifaddrmsg,
 119                     IFA_ADDRESS, 4, pattern, 4,
 120                     print_quoted_hex(pattern, 4));
 121
 122         SET_IFA_FAMILY(AF_INET);
 123
 124         if (!inet_pton(AF_INET, address4, &a4))
 125                 perror_msg_and_skip("inet_pton");
 126
 127         TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
 128                            init_ifaddrmsg, print_ifaddrmsg,
 129                            IFA_ADDRESS, pattern, a4,
 130                            printf("%s", address4));
 131
 132         SET_IFA_FAMILY(AF_INET6);
 133
 134         if (!inet_pton(AF_INET6, address6, &a6))
 135                 perror_msg_and_skip("inet_pton");
 136
 137         TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
 138                            init_ifaddrmsg, print_ifaddrmsg,
 139                            IFA_ADDRESS, pattern, a6,
 140                            printf("%s", address6));
 141
 142         TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
 143                            init_ifaddrmsg, print_ifaddrmsg,
 144                            IFA_CACHEINFO, pattern, ci,
 145                            PRINT_FIELD_U("{", ci, ifa_prefered);
 146                            PRINT_FIELD_U(", ", ci, ifa_valid);
 147                            PRINT_FIELD_U(", ", ci, cstamp);
 148                            PRINT_FIELD_U(", ", ci, tstamp);
 149                            printf("}"));
 150
 151         TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
 152                            init_ifaddrmsg, print_ifaddrmsg,
 153                            IFA_FLAGS, pattern, ifa_flags,
 154                            printf("IFA_F_SECONDARY|IFA_F_PERMANENT"));
 155
 156         puts("+++ exited with 0 +++");
 157         return 0;
 158 }