Line data    Source code

       1             : /* SPDX-License-Identifier: LGPL-2.1+ */
       2             : 
       3             : #include <arpa/inet.h>
       4             : #include <netinet/in.h>
       5             : #include <sys/socket.h>
       6             : 
       7             : #include "fd-util.h"
       8             : #include "fileio.h"
       9             : #include "fs-util.h"
      10             : #include "log.h"
      11             : #include "resolved-etc-hosts.h"
      12             : #include "strv.h"
      13             : #include "tests.h"
      14             : #include "tmpfile-util.h"
      15             : 
      16           1 : static void test_parse_etc_hosts_system(void) {
      17           1 :         _cleanup_fclose_ FILE *f = NULL;
      18             : 
      19           1 :         log_info("/* %s */", __func__);
      20             : 
      21           1 :         f = fopen("/etc/hosts", "re");
      22           1 :         if (!f) {
      23           0 :                 assert_se(errno == ENOENT);
      24           0 :                 return;
      25             :         }
      26             : 
      27           1 :         _cleanup_(etc_hosts_free) EtcHosts hosts = {};
      28           1 :         assert_se(etc_hosts_parse(&hosts, f) == 0);
      29             : }
      30             : 
      31             : #define address_equal_4(_addr, _address)                                \
      32             :         ((_addr)->family == AF_INET &&                                  \
      33             :          !memcmp(&(_addr)->address.in, &(struct in_addr) { .s_addr = (_address) }, 4))
      34             : 
      35             : #define address_equal_6(_addr, ...)                                     \
      36             :         ((_addr)->family == AF_INET6 &&                                 \
      37             :          !memcmp(&(_addr)->address.in6, &(struct in6_addr) { .s6_addr = __VA_ARGS__}, 16) )
      38             : 
      39           1 : static void test_parse_etc_hosts(void) {
      40             :         _cleanup_(unlink_tempfilep) char
      41           1 :                 t[] = "/tmp/test-resolved-etc-hosts.XXXXXX";
      42             : 
      43           1 :         log_info("/* %s */", __func__);
      44             : 
      45             :         int fd;
      46           1 :         _cleanup_fclose_ FILE *f;
      47             :         const char *s;
      48             : 
      49           1 :         fd = mkostemp_safe(t);
      50           1 :         assert_se(fd >= 0);
      51             : 
      52           1 :         f = fdopen(fd, "r+");
      53           1 :         assert_se(f);
      54           1 :         fputs("1.2.3.4 some.where\n"
      55             :               "1.2.3.5 some.where\n"
      56             :               "1.2.3.6 dash dash-dash.where-dash\n"
      57             :               "1.2.3.7 bad-dash- -bad-dash -bad-dash.bad-\n"
      58             :               "1.2.3.8\n"
      59             :               "1.2.3.9 before.comment # within.comment\n"
      60             :               "1.2.3.10 before.comment#within.comment2\n"
      61             :               "1.2.3.11 before.comment# within.comment3\n"
      62             :               "1.2.3.12 before.comment#\n"
      63             :               "1.2.3 short.address\n"
      64             :               "1.2.3.4.5 long.address\n"
      65             :               "1::2::3 multi.colon\n"
      66             : 
      67             :               "::0 some.where some.other\n"
      68             :               "0.0.0.0 black.listed\n"
      69             :               "::5\t\t\t \tsome.where\tsome.other foobar.foo.foo\t\t\t\n"
      70             :               "        \n", f);
      71           1 :         assert_se(fflush_and_check(f) >= 0);
      72           1 :         rewind(f);
      73             : 
      74           1 :         _cleanup_(etc_hosts_free) EtcHosts hosts = {};
      75           1 :         assert_se(etc_hosts_parse(&hosts, f) == 0);
      76             : 
      77             :         EtcHostsItemByName *bn;
      78           1 :         assert_se(bn = hashmap_get(hosts.by_name, "some.where"));
      79           1 :         assert_se(bn->n_addresses == 3);
      80           1 :         assert_se(bn->n_allocated >= 3);
      81           1 :         assert_se(address_equal_4(bn->addresses[0], inet_addr("1.2.3.4")));
      82           1 :         assert_se(address_equal_4(bn->addresses[1], inet_addr("1.2.3.5")));
      83           1 :         assert_se(address_equal_6(bn->addresses[2], {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5}));
      84             : 
      85           1 :         assert_se(bn = hashmap_get(hosts.by_name, "dash"));
      86           1 :         assert_se(bn->n_addresses == 1);
      87           1 :         assert_se(bn->n_allocated >= 1);
      88           1 :         assert_se(address_equal_4(bn->addresses[0], inet_addr("1.2.3.6")));
      89             : 
      90           1 :         assert_se(bn = hashmap_get(hosts.by_name, "dash-dash.where-dash"));
      91           1 :         assert_se(bn->n_addresses == 1);
      92           1 :         assert_se(bn->n_allocated >= 1);
      93           1 :         assert_se(address_equal_4(bn->addresses[0], inet_addr("1.2.3.6")));
      94             : 
      95             :         /* See https://tools.ietf.org/html/rfc1035#section-2.3.1 */
      96           4 :         FOREACH_STRING(s, "bad-dash-", "-bad-dash", "-bad-dash.bad-")
      97           3 :                 assert_se(!hashmap_get(hosts.by_name, s));
      98             : 
      99           1 :         assert_se(bn = hashmap_get(hosts.by_name, "before.comment"));
     100           1 :         assert_se(bn->n_addresses == 4);
     101           1 :         assert_se(bn->n_allocated >= 4);
     102           1 :         assert_se(address_equal_4(bn->addresses[0], inet_addr("1.2.3.9")));
     103           1 :         assert_se(address_equal_4(bn->addresses[1], inet_addr("1.2.3.10")));
     104           1 :         assert_se(address_equal_4(bn->addresses[2], inet_addr("1.2.3.11")));
     105           1 :         assert_se(address_equal_4(bn->addresses[3], inet_addr("1.2.3.12")));
     106             : 
     107           1 :         assert(!hashmap_get(hosts.by_name, "within.comment"));
     108           1 :         assert(!hashmap_get(hosts.by_name, "within.comment2"));
     109           1 :         assert(!hashmap_get(hosts.by_name, "within.comment3"));
     110           1 :         assert(!hashmap_get(hosts.by_name, "#"));
     111             : 
     112           1 :         assert(!hashmap_get(hosts.by_name, "short.address"));
     113           1 :         assert(!hashmap_get(hosts.by_name, "long.address"));
     114           1 :         assert(!hashmap_get(hosts.by_name, "multi.colon"));
     115           1 :         assert_se(!set_contains(hosts.no_address, "short.address"));
     116           1 :         assert_se(!set_contains(hosts.no_address, "long.address"));
     117           1 :         assert_se(!set_contains(hosts.no_address, "multi.colon"));
     118             : 
     119           1 :         assert_se(bn = hashmap_get(hosts.by_name, "some.other"));
     120           1 :         assert_se(bn->n_addresses == 1);
     121           1 :         assert_se(bn->n_allocated >= 1);
     122           1 :         assert_se(address_equal_6(bn->addresses[0], {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5}));
     123             : 
     124           1 :         assert_se( set_contains(hosts.no_address, "some.where"));
     125           1 :         assert_se( set_contains(hosts.no_address, "some.other"));
     126           1 :         assert_se( set_contains(hosts.no_address, "black.listed"));
     127           1 :         assert_se(!set_contains(hosts.no_address, "foobar.foo.foo"));
     128           1 : }
     129             : 
     130           0 : static void test_parse_file(const char *fname) {
     131           0 :         _cleanup_(etc_hosts_free) EtcHosts hosts = {};
     132           0 :         _cleanup_fclose_ FILE *f;
     133             : 
     134           0 :         log_info("/* %s(\"%s\") */", __func__, fname);
     135             : 
     136           0 :         assert_se(f = fopen(fname, "re"));
     137           0 :         assert_se(etc_hosts_parse(&hosts, f) == 0);
     138           0 : }
     139             : 
     140           1 : int main(int argc, char **argv) {
     141           1 :         test_setup_logging(LOG_DEBUG);
     142             : 
     143           1 :         if (argc == 1) {
     144           1 :                 test_parse_etc_hosts_system();
     145           1 :                 test_parse_etc_hosts();
     146             :         } else
     147           0 :                 test_parse_file(argv[1]);
     148             : 
     149           1 :         return 0;
     150             : }