src/resolve/test-dns-packet.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright © 2016 Zbigniew Jędrzejewski-Szmek
   4 ***/
   5
   6 #include <net/if.h>
   7 #include <glob.h>
   8
   9 #include "sd-id128.h"
  10
  11 #include "alloc-util.h"
  12 #include "fileio.h"
  13 #include "glob-util.h"
  14 #include "log.h"
  15 #include "macro.h"
  16 #include "resolved-dns-packet.h"
  17 #include "resolved-dns-rr.h"
  18 #include "string-util.h"
  19 #include "strv.h"
  20 #include "tests.h"
  21 #include "unaligned.h"
  22
  23 #define HASH_KEY SD_ID128_MAKE(d3,1e,48,90,4b,fa,4c,fe,af,9d,d5,a1,d7,2e,8a,b1)
  24
  25 static void verify_rr_copy(DnsResourceRecord *rr) {
  26         _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *copy = NULL;
  27         const char *a, *b;
  28
  29         assert_se(copy = dns_resource_record_copy(rr));
  30         assert_se(dns_resource_record_equal(copy, rr) > 0);
  31
  32         assert_se(a = dns_resource_record_to_string(rr));
  33         assert_se(b = dns_resource_record_to_string(copy));
  34
  35         assert_se(streq(a, b));
  36 }
  37
  38 static uint64_t hash(DnsResourceRecord *rr) {
  39         struct siphash state;
  40
  41         siphash24_init(&state, HASH_KEY.bytes);
  42         dns_resource_record_hash_func(rr, &state);
  43         return siphash24_finalize(&state);
  44 }
  45
  46 static void test_packet_from_file(const char* filename, bool canonical) {
  47         _cleanup_free_ char *data = NULL;
  48         size_t data_size, packet_size, offset;
  49
  50         assert_se(read_full_file(filename, &data, &data_size) >= 0);
  51         assert_se(data);
  52         assert_se(data_size > 8);
  53
  54         log_info("============== %s %s==============", filename, canonical ? "canonical " : "");
  55
  56         for (offset = 0; offset < data_size; offset += 8 + packet_size) {
  57                 _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL, *p2 = NULL;
  58                 _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL, *rr2 = NULL;
  59                 const char *s, *s2;
  60                 uint64_t hash1, hash2;
  61
  62                 packet_size = unaligned_read_le64(data + offset);
  63                 assert_se(packet_size > 0);
  64                 assert_se(offset + 8 + packet_size <= data_size);
  65
  66                 assert_se(dns_packet_new(&p, DNS_PROTOCOL_DNS, 0, DNS_PACKET_SIZE_MAX) >= 0);
  67
  68                 assert_se(dns_packet_append_blob(p, data + offset + 8, packet_size, NULL) >= 0);
  69                 assert_se(dns_packet_read_rr(p, &rr, NULL, NULL) >= 0);
  70
  71                 verify_rr_copy(rr);
  72
  73                 s = dns_resource_record_to_string(rr);
  74                 assert_se(s);
  75                 puts(s);
  76
  77                 hash1 = hash(rr);
  78
  79                 assert_se(dns_resource_record_to_wire_format(rr, canonical) >= 0);
  80
  81                 assert_se(dns_packet_new(&p2, DNS_PROTOCOL_DNS, 0, DNS_PACKET_SIZE_MAX) >= 0);
  82                 assert_se(dns_packet_append_blob(p2, rr->wire_format, rr->wire_format_size, NULL) >= 0);
  83                 assert_se(dns_packet_read_rr(p2, &rr2, NULL, NULL) >= 0);
  84
  85                 verify_rr_copy(rr);
  86
  87                 s2 = dns_resource_record_to_string(rr);
  88                 assert_se(s2);
  89                 assert_se(streq(s, s2));
  90
  91                 hash2 = hash(rr);
  92                 assert_se(hash1 == hash2);
  93         }
  94 }
  95
  96 int main(int argc, char **argv) {
  97         int i, N;
  98         _cleanup_globfree_ glob_t g = {};
  99         char **fnames;
 100
 101         log_parse_environment();
 102
 103         if (argc >= 2) {
 104                 N = argc - 1;
 105                 fnames = argv + 1;
 106         } else {
 107                 assert_se(glob(get_testdata_dir("/test-resolve/*.pkts"), 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 }