/*** This file is part of systemd Copyright 2016 Zbigniew Jędrzejewski-Szmek systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <net/if.h> #include <glob.h> #include "alloc-util.h" #include "fileio.h" #include "glob-util.h" #include "log.h" #include "macro.h" #include "resolved-dns-packet.h" #include "resolved-dns-rr.h" #include "string-util.h" #include "strv.h" #define HASH_KEY SD_ID128_MAKE(d3,1e,48,90,4b,fa,4c,fe,af,9d,d5,a1,d7,2e,8a,b1) static uint64_t hash(DnsResourceRecord *rr) { struct siphash state; siphash24_init(&state, HASH_KEY.bytes); dns_resource_record_hash_func(rr, &state); return siphash24_finalize(&state); } static void test_packet_from_file(const char* filename, bool canonical) { _cleanup_free_ char *data = NULL; size_t data_size, packet_size, offset; assert_se(read_full_file(filename, &data, &data_size) >= 0); assert_se(data); assert_se(data_size > 8); log_info("============== %s %s==============", filename, canonical ? "canonical " : ""); for (offset = 0; offset < data_size; offset += 8 + packet_size) { _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL, *p2 = NULL; _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL, *rr2 = NULL; const char *s, *s2; uint64_t hash1, hash2; packet_size = le64toh( *(uint64_t*)(data + offset) ); assert_se(packet_size > 0); assert_se(offset + 8 + packet_size <= data_size); assert_se(dns_packet_new(&p, DNS_PROTOCOL_DNS, 0) >= 0); assert_se(dns_packet_append_blob(p, data + offset + 8, packet_size, NULL) >= 0); assert_se(dns_packet_read_rr(p, &rr, NULL, NULL) >= 0); s = dns_resource_record_to_string(rr); assert_se(s); puts(s); hash1 = hash(rr); assert_se(dns_resource_record_to_wire_format(rr, canonical) >= 0); assert_se(dns_packet_new(&p2, DNS_PROTOCOL_DNS, 0) >= 0); assert_se(dns_packet_append_blob(p2, rr->wire_format, rr->wire_format_size, NULL) >= 0); assert_se(dns_packet_read_rr(p2, &rr2, NULL, NULL) >= 0); s2 = dns_resource_record_to_string(rr); assert_se(s2); assert_se(streq(s, s2)); hash2 = hash(rr); assert_se(hash1 == hash2); } } int main(int argc, char **argv) { int i, N; _cleanup_globfree_ glob_t g = {}; char **fnames; log_parse_environment(); if (argc >= 2) { N = argc - 1; fnames = argv + 1; } else { assert_se(glob(RESOLVE_TEST_DIR "/*.pkts", GLOB_NOSORT, NULL, &g) == 0); N = g.gl_pathc; fnames = g.gl_pathv; } for (i = 0; i < N; i++) { test_packet_from_file(fnames[i], false); puts(""); test_packet_from_file(fnames[i], true); if (i + 1 < N) puts(""); } return EXIT_SUCCESS; }