/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include #include "fd-util.h" #include "fileio.h" #include "fs-util.h" #include "log.h" #include "resolved-etc-hosts.h" #include "strv.h" #include "tests.h" #include "tmpfile-util.h" static void test_parse_etc_hosts_system(void) { _cleanup_fclose_ FILE *f = NULL; log_info("/* %s */", __func__); f = fopen("/etc/hosts", "re"); if (!f) { assert_se(errno == ENOENT); return; } _cleanup_(etc_hosts_free) EtcHosts hosts = {}; assert_se(etc_hosts_parse(&hosts, f) == 0); } #define address_equal_4(_addr, _address) \ ((_addr)->family == AF_INET && \ !memcmp(&(_addr)->address.in, &(struct in_addr) { .s_addr = (_address) }, 4)) #define address_equal_6(_addr, ...) \ ((_addr)->family == AF_INET6 && \ !memcmp(&(_addr)->address.in6, &(struct in6_addr) { .s6_addr = __VA_ARGS__}, 16) ) static void test_parse_etc_hosts(void) { _cleanup_(unlink_tempfilep) char t[] = "/tmp/test-resolved-etc-hosts.XXXXXX"; log_info("/* %s */", __func__); int fd; _cleanup_fclose_ FILE *f; const char *s; fd = mkostemp_safe(t); assert_se(fd >= 0); f = fdopen(fd, "r+"); assert_se(f); fputs("1.2.3.4 some.where\n" "1.2.3.5 some.where\n" "1.2.3.6 dash dash-dash.where-dash\n" "1.2.3.7 bad-dash- -bad-dash -bad-dash.bad-\n" "1.2.3.8\n" "1.2.3.9 before.comment # within.comment\n" "1.2.3.10 before.comment#within.comment2\n" "1.2.3.11 before.comment# within.comment3\n" "1.2.3.12 before.comment#\n" "1.2.3 short.address\n" "1.2.3.4.5 long.address\n" "1::2::3 multi.colon\n" "::0 some.where some.other\n" "0.0.0.0 deny.listed\n" "::5\t\t\t \tsome.where\tsome.other foobar.foo.foo\t\t\t\n" " \n", f); assert_se(fflush_and_check(f) >= 0); rewind(f); _cleanup_(etc_hosts_free) EtcHosts hosts = {}; assert_se(etc_hosts_parse(&hosts, f) == 0); EtcHostsItemByName *bn; assert_se(bn = hashmap_get(hosts.by_name, "some.where")); assert_se(bn->n_addresses == 3); assert_se(bn->n_allocated >= 3); assert_se(address_equal_4(bn->addresses[0], inet_addr("1.2.3.4"))); assert_se(address_equal_4(bn->addresses[1], inet_addr("1.2.3.5"))); assert_se(address_equal_6(bn->addresses[2], {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5})); assert_se(bn = hashmap_get(hosts.by_name, "dash")); assert_se(bn->n_addresses == 1); assert_se(bn->n_allocated >= 1); assert_se(address_equal_4(bn->addresses[0], inet_addr("1.2.3.6"))); assert_se(bn = hashmap_get(hosts.by_name, "dash-dash.where-dash")); assert_se(bn->n_addresses == 1); assert_se(bn->n_allocated >= 1); assert_se(address_equal_4(bn->addresses[0], inet_addr("1.2.3.6"))); /* See https://tools.ietf.org/html/rfc1035#section-2.3.1 */ FOREACH_STRING(s, "bad-dash-", "-bad-dash", "-bad-dash.bad-") assert_se(!hashmap_get(hosts.by_name, s)); assert_se(bn = hashmap_get(hosts.by_name, "before.comment")); assert_se(bn->n_addresses == 4); assert_se(bn->n_allocated >= 4); assert_se(address_equal_4(bn->addresses[0], inet_addr("1.2.3.9"))); assert_se(address_equal_4(bn->addresses[1], inet_addr("1.2.3.10"))); assert_se(address_equal_4(bn->addresses[2], inet_addr("1.2.3.11"))); assert_se(address_equal_4(bn->addresses[3], inet_addr("1.2.3.12"))); assert(!hashmap_get(hosts.by_name, "within.comment")); assert(!hashmap_get(hosts.by_name, "within.comment2")); assert(!hashmap_get(hosts.by_name, "within.comment3")); assert(!hashmap_get(hosts.by_name, "#")); assert(!hashmap_get(hosts.by_name, "short.address")); assert(!hashmap_get(hosts.by_name, "long.address")); assert(!hashmap_get(hosts.by_name, "multi.colon")); assert_se(!set_contains(hosts.no_address, "short.address")); assert_se(!set_contains(hosts.no_address, "long.address")); assert_se(!set_contains(hosts.no_address, "multi.colon")); assert_se(bn = hashmap_get(hosts.by_name, "some.other")); assert_se(bn->n_addresses == 1); assert_se(bn->n_allocated >= 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})); assert_se( set_contains(hosts.no_address, "some.where")); assert_se( set_contains(hosts.no_address, "some.other")); assert_se( set_contains(hosts.no_address, "deny.listed")); assert_se(!set_contains(hosts.no_address, "foobar.foo.foo")); } static void test_parse_file(const char *fname) { _cleanup_(etc_hosts_free) EtcHosts hosts = {}; _cleanup_fclose_ FILE *f; log_info("/* %s(\"%s\") */", __func__, fname); assert_se(f = fopen(fname, "re")); assert_se(etc_hosts_parse(&hosts, f) == 0); } int main(int argc, char **argv) { test_setup_logging(LOG_DEBUG); if (argc == 1) { test_parse_etc_hosts_system(); test_parse_etc_hosts(); } else test_parse_file(argv[1]); return 0; }