src/resolve/test-dns-packet.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <net/if.h>
   4
   5 #include "sd-id128.h"
   6
   7 #include "alloc-util.h"
   8 #include "fileio.h"
   9 #include "glob-util.h"
  10 #include "log.h"
  11 #include "macro.h"
  12 #include "resolved-dns-packet.h"
  13 #include "resolved-dns-rr.h"
  14 #include "path-util.h"
  15 #include "string-util.h"
  16 #include "strv.h"
  17 #include "tests.h"
  18 #include "unaligned.h"
  19
  20 #define HASH_KEY SD_ID128_MAKE(d3,1e,48,90,4b,fa,4c,fe,af,9d,d5,a1,d7,2e,8a,b1)
  21
  22 static void verify_rr_copy(DnsResourceRecord *rr) {
  23         _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *copy = NULL;
  24         const char *a, *b;
  25
  26         assert_se(copy = dns_resource_record_copy(rr));
  27         assert_se(dns_resource_record_equal(copy, rr) > 0);
  28
  29         assert_se(a = dns_resource_record_to_string(rr));
  30         assert_se(b = dns_resource_record_to_string(copy));
  31
  32         assert_se(streq(a, b));
  33 }
  34
  35 static uint64_t hash(DnsResourceRecord *rr) {
  36         struct siphash state;
  37
  38         siphash24_init(&state, HASH_KEY.bytes);
  39         dns_resource_record_hash_func(rr, &state);
  40         return siphash24_finalize(&state);
  41 }
  42
  43 static void test_packet_from_file(const char* filename, bool canonical) {
  44         _cleanup_free_ char *data = NULL;
  45         size_t data_size, packet_size, offset;
  46
  47         assert_se(read_full_file(filename, &data, &data_size) >= 0);
  48         assert_se(data);
  49         assert_se(data_size > 8);
  50
  51         log_info("============== %s %s==============", filename, canonical ? "canonical " : "");
  52
  53         for (offset = 0; offset < data_size; offset += 8 + packet_size) {
  54                 _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL, *p2 = NULL;
  55                 _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL, *rr2 = NULL;
  56                 const char *s, *s2;
  57                 uint64_t hash1, hash2;
  58
  59                 packet_size = unaligned_read_le64(data + offset);
  60                 assert_se(packet_size > 0);
  61                 assert_se(offset + 8 + packet_size <= data_size);
  62
  63                 assert_se(dns_packet_new(&p, DNS_PROTOCOL_DNS, 0, DNS_PACKET_SIZE_MAX) >= 0);
  64
  65                 assert_se(dns_packet_append_blob(p, data + offset + 8, packet_size, NULL) >= 0);
  66                 assert_se(dns_packet_read_rr(p, &rr, NULL, NULL) >= 0);
  67
  68                 verify_rr_copy(rr);
  69
  70                 s = dns_resource_record_to_string(rr);
  71                 assert_se(s);
  72                 puts(s);
  73
  74                 hash1 = hash(rr);
  75
  76                 assert_se(dns_resource_record_to_wire_format(rr, canonical) >= 0);
  77
  78                 assert_se(dns_packet_new(&p2, DNS_PROTOCOL_DNS, 0, DNS_PACKET_SIZE_MAX) >= 0);
  79                 assert_se(dns_packet_append_blob(p2, rr->wire_format, rr->wire_format_size, NULL) >= 0);
  80                 assert_se(dns_packet_read_rr(p2, &rr2, NULL, NULL) >= 0);
  81
  82                 verify_rr_copy(rr);
  83
  84                 s2 = dns_resource_record_to_string(rr);
  85                 assert_se(s2);
  86                 assert_se(streq(s, s2));
  87
  88                 hash2 = hash(rr);
  89                 assert_se(hash1 == hash2);
  90         }
  91 }
  92
  93 static void test_dns_resource_record_get_cname_target(void) {
  94         _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *cname = NULL, *dname = NULL;
  95         _cleanup_free_ char *target = NULL;
  96
  97         assert_se(cname = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_CNAME, "quux.foobar"));
  98         assert_se(cname->cname.name = strdup("wuff.wuff"));
  99
 100         assert_se(dns_resource_record_get_cname_target(&DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_A, "waldo"), cname, &target) == -EUNATCH);
 101         assert_se(dns_resource_record_get_cname_target(&DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_A, "foobar"), cname, &target) == -EUNATCH);
 102         assert_se(dns_resource_record_get_cname_target(&DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_A, "quux"), cname, &target) == -EUNATCH);
 103         assert_se(dns_resource_record_get_cname_target(&DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_A, ""), cname, &target) == -EUNATCH);
 104         assert_se(dns_resource_record_get_cname_target(&DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_A, "."), cname, &target) == -EUNATCH);
 105         assert_se(dns_resource_record_get_cname_target(&DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_A, "nope.quux.foobar"), cname, &target) == -EUNATCH);
 106         assert_se(dns_resource_record_get_cname_target(&DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_A, "quux.foobar"), cname, &target) == 0);
 107         assert_se(streq(target, "wuff.wuff"));
 108         target = mfree(target);
 109
 110         assert_se(dname = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_DNAME, "quux.foobar"));
 111         assert_se(dname->dname.name = strdup("wuff.wuff"));
 112
 113         assert_se(dns_resource_record_get_cname_target(&DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_A, "waldo"), dname, &target) == -EUNATCH);
 114         assert_se(dns_resource_record_get_cname_target(&DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_A, "foobar"), dname, &target) == -EUNATCH);
 115         assert_se(dns_resource_record_get_cname_target(&DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_A, "quux"), dname, &target) == -EUNATCH);
 116         assert_se(dns_resource_record_get_cname_target(&DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_A, ""), dname, &target) == -EUNATCH);
 117         assert_se(dns_resource_record_get_cname_target(&DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_A, "."), dname, &target) == -EUNATCH);
 118         assert_se(dns_resource_record_get_cname_target(&DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_A, "yupp.quux.foobar"), dname, &target) == 0);
 119         assert_se(streq(target, "yupp.wuff.wuff"));
 120         target = mfree(target);
 121
 122         assert_se(dns_resource_record_get_cname_target(&DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_A, "quux.foobar"), cname, &target) == 0);
 123         assert_se(streq(target, "wuff.wuff"));
 124 }
 125
 126 int main(int argc, char **argv) {
 127         int N;
 128         _cleanup_globfree_ glob_t g = {};
 129         char **fnames;
 130
 131         test_setup_logging(LOG_DEBUG);
 132
 133         if (argc >= 2) {
 134                 N = argc - 1;
 135                 fnames = argv + 1;
 136         } else {
 137                 _cleanup_free_ char *pkts_glob = NULL;
 138                 assert_se(get_testdata_dir("test-resolve/*.pkts", &pkts_glob) >= 0);
 139                 assert_se(glob(pkts_glob, GLOB_NOSORT, NULL, &g) == 0);
 140                 N = g.gl_pathc;
 141                 fnames = g.gl_pathv;
 142         }
 143
 144         for (int i = 0; i < N; i++) {
 145                 test_packet_from_file(fnames[i], false);
 146                 puts("");
 147                 test_packet_from_file(fnames[i], true);
 148                 if (i + 1 < N)
 149                         puts("");
 150         }
 151
 152         test_dns_resource_record_get_cname_target();
 153
 154         return EXIT_SUCCESS;
 155 }