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

   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 "tmpfile-util.h"
  14
  15 static void test_parse_etc_hosts_system(void) {
  16         _cleanup_fclose_ FILE *f = NULL;
  17
  18         log_info("/* %s */", __func__);
  19
  20         f = fopen("/etc/hosts", "re");
  21         if (!f) {
  22                 assert_se(errno == ENOENT);
  23                 return;
  24         }
  25
  26         _cleanup_(etc_hosts_free) EtcHosts hosts = {};
  27         assert_se(etc_hosts_parse(&hosts, f) == 0);
  28 }
  29
  30 #define address_equal_4(_addr, _address)                                \
  31         ((_addr)->family == AF_INET &&                                  \
  32          !memcmp(&(_addr)->address.in, &(struct in_addr) { .s_addr = (_address) }, 4))
  33
  34 #define address_equal_6(_addr, ...)                                     \
  35         ((_addr)->family == AF_INET6 &&                                 \
  36          !memcmp(&(_addr)->address.in6, &(struct in6_addr) { .s6_addr = __VA_ARGS__}, 16) )
  37
  38 static void test_parse_etc_hosts(void) {
  39         _cleanup_(unlink_tempfilep) char
  40                 t[] = "/tmp/test-resolved-etc-hosts.XXXXXX";
  41
  42         log_info("/* %s */", __func__);
  43
  44         int fd;
  45         _cleanup_fclose_ FILE *f;
  46         const char *s;
  47
  48         fd = mkostemp_safe(t);
  49         assert_se(fd >= 0);
  50
  51         f = fdopen(fd, "r+");
  52         assert_se(f);
  53         fputs("1.2.3.4 some.where\n"
  54               "1.2.3.5 some.where\n"
  55               "1.2.3.6 dash dash-dash.where-dash\n"
  56               "1.2.3.7 bad-dash- -bad-dash -bad-dash.bad-\n"
  57               "1.2.3.8\n"
  58               "1.2.3.9 before.comment # within.comment\n"
  59               "1.2.3.10 before.comment#within.comment2\n"
  60               "1.2.3.11 before.comment# within.comment3\n"
  61               "1.2.3.12 before.comment#\n"
  62               "1.2.3 short.address\n"
  63               "1.2.3.4.5 long.address\n"
  64               "1::2::3 multi.colon\n"
  65
  66               "::0 some.where some.other\n"
  67               "0.0.0.0 black.listed\n"
  68               "::5\t\t\t \tsome.where\tsome.other foobar.foo.foo\t\t\t\n"
  69               "        \n", f);
  70         assert_se(fflush_and_check(f) >= 0);
  71         rewind(f);
  72
  73         _cleanup_(etc_hosts_free) EtcHosts hosts = {};
  74         assert_se(etc_hosts_parse(&hosts, f) == 0);
  75
  76         EtcHostsItemByName *bn;
  77         assert_se(bn = hashmap_get(hosts.by_name, "some.where"));
  78         assert_se(bn->n_addresses == 3);
  79         assert_se(bn->n_allocated >= 3);
  80         assert_se(address_equal_4(bn->addresses[0], inet_addr("1.2.3.4")));
  81         assert_se(address_equal_4(bn->addresses[1], inet_addr("1.2.3.5")));
  82         assert_se(address_equal_6(bn->addresses[2], {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5}));
  83
  84         assert_se(bn = hashmap_get(hosts.by_name, "dash"));
  85         assert_se(bn->n_addresses == 1);
  86         assert_se(bn->n_allocated >= 1);
  87         assert_se(address_equal_4(bn->addresses[0], inet_addr("1.2.3.6")));
  88
  89         assert_se(bn = hashmap_get(hosts.by_name, "dash-dash.where-dash"));
  90         assert_se(bn->n_addresses == 1);
  91         assert_se(bn->n_allocated >= 1);
  92         assert_se(address_equal_4(bn->addresses[0], inet_addr("1.2.3.6")));
  93
  94         /* See https://tools.ietf.org/html/rfc1035#section-2.3.1 */
  95         FOREACH_STRING(s, "bad-dash-", "-bad-dash", "-bad-dash.bad-")
  96                 assert_se(!hashmap_get(hosts.by_name, s));
  97
  98         assert_se(bn = hashmap_get(hosts.by_name, "before.comment"));
  99         assert_se(bn->n_addresses == 4);
 100         assert_se(bn->n_allocated >= 4);
 101         assert_se(address_equal_4(bn->addresses[0], inet_addr("1.2.3.9")));
 102         assert_se(address_equal_4(bn->addresses[1], inet_addr("1.2.3.10")));
 103         assert_se(address_equal_4(bn->addresses[2], inet_addr("1.2.3.11")));
 104         assert_se(address_equal_4(bn->addresses[3], inet_addr("1.2.3.12")));
 105
 106         assert(!hashmap_get(hosts.by_name, "within.comment"));
 107         assert(!hashmap_get(hosts.by_name, "within.comment2"));
 108         assert(!hashmap_get(hosts.by_name, "within.comment3"));
 109         assert(!hashmap_get(hosts.by_name, "#"));
 110
 111         assert(!hashmap_get(hosts.by_name, "short.address"));
 112         assert(!hashmap_get(hosts.by_name, "long.address"));
 113         assert(!hashmap_get(hosts.by_name, "multi.colon"));
 114         assert_se(!set_contains(hosts.no_address, "short.address"));
 115         assert_se(!set_contains(hosts.no_address, "long.address"));
 116         assert_se(!set_contains(hosts.no_address, "multi.colon"));
 117
 118         assert_se(bn = hashmap_get(hosts.by_name, "some.other"));
 119         assert_se(bn->n_addresses == 1);
 120         assert_se(bn->n_allocated >= 1);
 121         assert_se(address_equal_6(bn->addresses[0], {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5}));
 122
 123         assert_se( set_contains(hosts.no_address, "some.where"));
 124         assert_se( set_contains(hosts.no_address, "some.other"));
 125         assert_se( set_contains(hosts.no_address, "black.listed"));
 126         assert_se(!set_contains(hosts.no_address, "foobar.foo.foo"));
 127 }
 128
 129 static void test_parse_file(const char *fname) {
 130         _cleanup_(etc_hosts_free) EtcHosts hosts = {};
 131         _cleanup_fclose_ FILE *f;
 132
 133         log_info("/* %s(\"%s\") */", __func__, fname);
 134
 135         assert_se(f = fopen(fname, "re"));
 136         assert_se(etc_hosts_parse(&hosts, f) == 0);
 137 }
 138
 139 int main(int argc, char **argv) {
 140         log_set_max_level(LOG_DEBUG);
 141         log_parse_environment();
 142         log_open();
 143
 144         if (argc == 1) {
 145                 test_parse_etc_hosts_system();
 146                 test_parse_etc_hosts();
 147         } else
 148                 test_parse_file(argv[1]);
 149
 150         return 0;
 151 }