src/resolve/test-dns-packet.c

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