src/resolve/test-resolved-etc-hosts.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <arpa/inet.h>
   4 #include <malloc.h>
   5 #include <netinet/in.h>
   6 #include <sys/socket.h>
   7
   8 #include "fd-util.h"
   9 #include "fileio.h"
  10 #include "fs-util.h"
  11 #include "log.h"
  12 #include "resolved-etc-hosts.h"
  13 #include "strv.h"
  14 #include "tests.h"
  15 #include "tmpfile-util.h"
  16
  17 TEST(parse_etc_hosts_system) {
  18         _cleanup_fclose_ FILE *f = NULL;
  19
  20         f = fopen("/etc/hosts", "re");
  21         if (!f) {
  22                 assert_se(errno == ENOENT);
  23                 return;
  24         }
  25
  26         _cleanup_(etc_hosts_clear) EtcHosts hosts = {};
  27         assert_se(etc_hosts_parse(&hosts, f) == 0);
  28 }
  29
  30 #define has_4(_set, _address_str)                                       \
  31         set_contains(_set, &(struct in_addr_data) { .family = AF_INET, .address.in = { .s_addr = inet_addr(_address_str) } })
  32
  33 #define has_6(_set, ...)                                           \
  34         set_contains(_set, &(struct in_addr_data) { .family = AF_INET6, .address.in6 = { .s6_addr = __VA_ARGS__ } })
  35
  36 TEST(parse_etc_hosts) {
  37         _cleanup_(unlink_tempfilep) char
  38                 t[] = "/tmp/test-resolved-etc-hosts.XXXXXX";
  39
  40         int fd;
  41         _cleanup_fclose_ FILE *f;
  42
  43         fd = mkostemp_safe(t);
  44         assert_se(fd >= 0);
  45
  46         f = fdopen(fd, "r+");
  47         assert_se(f);
  48         fputs("1.2.3.4 some.where\n"
  49               "1.2.3.5 some.where\n"
  50               "1.2.3.6 dash dash-dash.where-dash\n"
  51               "1.2.3.7 bad-dash- -bad-dash -bad-dash.bad-\n"
  52               "1.2.3.8\n"
  53               "1.2.3.9 before.comment # within.comment\n"
  54               "1.2.3.10 before.comment#within.comment2\n"
  55               "1.2.3.11 before.comment# within.comment3\n"
  56               "1.2.3.12 before.comment#\n"
  57               "1.2.3 short.address\n"
  58               "1.2.3.4.5 long.address\n"
  59               "1::2::3 multi.colon\n"
  60
  61               "::0 some.where some.other\n"
  62               "0.0.0.0 deny.listed\n"
  63               "::5\t\t\t \tsome.where\tsome.other foobar.foo.foo\t\t\t\n"
  64               "        \n", f);
  65         assert_se(fflush_and_check(f) >= 0);
  66         rewind(f);
  67
  68         _cleanup_(etc_hosts_clear) EtcHosts hosts = {};
  69         assert_se(etc_hosts_parse(&hosts, f) == 0);
  70
  71         EtcHostsItemByName *bn;
  72         assert_se(bn = hashmap_get(hosts.by_name, "some.where"));
  73         assert_se(set_size(bn->addresses) == 3);
  74         assert_se(has_4(bn->addresses, "1.2.3.4"));
  75         assert_se(has_4(bn->addresses, "1.2.3.5"));
  76         assert_se(has_6(bn->addresses, {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5}));
  77
  78         assert_se(bn = hashmap_get(hosts.by_name, "dash"));
  79         assert_se(set_size(bn->addresses) == 1);
  80         assert_se(has_4(bn->addresses, "1.2.3.6"));
  81
  82         assert_se(bn = hashmap_get(hosts.by_name, "dash-dash.where-dash"));
  83         assert_se(set_size(bn->addresses) == 1);
  84         assert_se(has_4(bn->addresses, "1.2.3.6"));
  85
  86         /* See https://tools.ietf.org/html/rfc1035#section-2.3.1 */
  87         FOREACH_STRING(s, "bad-dash-", "-bad-dash", "-bad-dash.bad-")
  88                 assert_se(!hashmap_get(hosts.by_name, s));
  89
  90         assert_se(bn = hashmap_get(hosts.by_name, "before.comment"));
  91         assert_se(set_size(bn->addresses) == 4);
  92         assert_se(has_4(bn->addresses, "1.2.3.9"));
  93         assert_se(has_4(bn->addresses, "1.2.3.10"));
  94         assert_se(has_4(bn->addresses, "1.2.3.11"));
  95         assert_se(has_4(bn->addresses, "1.2.3.12"));
  96
  97         assert_se(!hashmap_get(hosts.by_name, "within.comment"));
  98         assert_se(!hashmap_get(hosts.by_name, "within.comment2"));
  99         assert_se(!hashmap_get(hosts.by_name, "within.comment3"));
 100         assert_se(!hashmap_get(hosts.by_name, "#"));
 101
 102         assert_se(!hashmap_get(hosts.by_name, "short.address"));
 103         assert_se(!hashmap_get(hosts.by_name, "long.address"));
 104         assert_se(!hashmap_get(hosts.by_name, "multi.colon"));
 105         assert_se(!set_contains(hosts.no_address, "short.address"));
 106         assert_se(!set_contains(hosts.no_address, "long.address"));
 107         assert_se(!set_contains(hosts.no_address, "multi.colon"));
 108
 109         assert_se(bn = hashmap_get(hosts.by_name, "some.other"));
 110         assert_se(set_size(bn->addresses) == 1);
 111         assert_se(has_6(bn->addresses, {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5}));
 112
 113         assert_se( set_contains(hosts.no_address, "some.where"));
 114         assert_se( set_contains(hosts.no_address, "some.other"));
 115         assert_se( set_contains(hosts.no_address, "deny.listed"));
 116         assert_se(!set_contains(hosts.no_address, "foobar.foo.foo"));
 117 }
 118
 119 static void test_parse_file_one(const char *fname) {
 120         _cleanup_(etc_hosts_clear) EtcHosts hosts = {};
 121         _cleanup_fclose_ FILE *f;
 122
 123         log_info("/* %s(\"%s\") */", __func__, fname);
 124
 125         assert_se(f = fopen(fname, "re"));
 126         assert_se(etc_hosts_parse(&hosts, f) == 0);
 127 }
 128
 129 TEST(parse_file) {
 130         for (int i = 1; i < saved_argc; i++)
 131                 test_parse_file_one(saved_argv[i]);
 132 }
 133
 134 DEFINE_TEST_MAIN(LOG_DEBUG);