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test-dns-packet: add framework to read and dump packets

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Packets are stored in a simple format:
<size> <packet-wire-format> <size> <packet-wire-format> ...

Packets for some example domains are dumped, to test rr code for various
record types. Currently:
A
AAAA
CAA
DNSKEY
LOC
MX
NS
NSEC
OPENPGPKEY
SOA
SPF
TXT

The hashing code is executed, but results are not checked.

Also build other tests in src/resolve only with --enable-resolve.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2016-01-31 00:10:42 -05:00
parent e18a3c7314
commit 6d99904f5a
13 changed files with 149 additions and 47 deletions
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1
.gitignore vendored
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@ -184,6 +184,7 @@
/test-dhcp-server
/test-dhcp6-client
/test-dns-domain
/test-dns-packet
/test-dnssec
/test-efi-disk.img
/test-ellipsize

91
Makefile.am
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@ -1501,6 +1501,7 @@ tests += \
test-af-list \
test-arphrd-list \
test-dns-domain \
test-dns-packet \
test-resolve-tables \
test-install-root \
test-rlimit-util \
@ -1666,16 +1667,6 @@ test_dns_domain_LDADD = \
libsystemd-network.la \
libshared.la
test_resolve_tables_SOURCES = \
src/resolve/test-resolve-tables.c \
src/shared/test-tables.h \
src/resolve/dns-type.c \
src/resolve/dns-type.h \
src/resolve/dns_type-from-name.h \
src/resolve/dns_type-to-name.h
test_resolve_tables_LDADD = \
libshared.la
if ENABLE_EFI
manual_tests += \
@ -5166,6 +5157,20 @@ EXTRA_DIST += \
# ------------------------------------------------------------------------------
if ENABLE_RESOLVED
basic_dns_sources = \
src/resolve/resolved-dns-dnssec.c \
src/resolve/resolved-dns-dnssec.h \
src/resolve/resolved-dns-packet.c \
src/resolve/resolved-dns-packet.h \
src/resolve/resolved-dns-rr.c \
src/resolve/resolved-dns-rr.h \
src/resolve/resolved-dns-answer.c \
src/resolve/resolved-dns-answer.h \
src/resolve/resolved-dns-question.c \
src/resolve/resolved-dns-question.h \
src/resolve/dns-type.c \
src/resolve/dns-type.h
systemd_resolved_SOURCES = \
src/resolve/resolved.c \
src/resolve/resolved-manager.c \
@ -5185,14 +5190,7 @@ systemd_resolved_SOURCES = \
src/resolve/resolved-mdns.h \
src/resolve/resolved-mdns.c \
src/resolve/resolved-def.h \
src/resolve/resolved-dns-rr.h \
src/resolve/resolved-dns-rr.c \
src/resolve/resolved-dns-question.h \
src/resolve/resolved-dns-question.c \
src/resolve/resolved-dns-answer.h \
src/resolve/resolved-dns-answer.c \
src/resolve/resolved-dns-packet.h \
src/resolve/resolved-dns-packet.c \
$(basic_dns_sources) \
src/resolve/resolved-dns-query.h \
src/resolve/resolved-dns-query.c \
src/resolve/resolved-dns-synthesize.h \
@ -5211,14 +5209,10 @@ systemd_resolved_SOURCES = \
src/resolve/resolved-dns-zone.c \
src/resolve/resolved-dns-stream.h \
src/resolve/resolved-dns-stream.c \
src/resolve/resolved-dns-dnssec.h \
src/resolve/resolved-dns-dnssec.c \
src/resolve/resolved-dns-trust-anchor.h \
src/resolve/resolved-dns-trust-anchor.c \
src/resolve/resolved-etc-hosts.h \
src/resolve/resolved-etc-hosts.c \
src/resolve/dns-type.c \
src/resolve/dns-type.h \
src/shared/gcrypt-util.c \
src/shared/gcrypt-util.h
@ -5280,18 +5274,7 @@ lib_LTLIBRARIES += \
systemd_resolve_SOURCES = \
src/resolve/resolve-tool.c \
src/resolve/resolved-dns-dnssec.c \
src/resolve/resolved-dns-dnssec.h \
src/resolve/resolved-dns-packet.c \
src/resolve/resolved-dns-packet.h \
src/resolve/resolved-dns-rr.c \
src/resolve/resolved-dns-rr.h \
src/resolve/resolved-dns-answer.c \
src/resolve/resolved-dns-answer.h \
src/resolve/resolved-dns-question.c \
src/resolve/resolved-dns-question.h \
src/resolve/dns-type.c \
src/resolve/dns-type.h \
$(basic_dns_sources) \
src/shared/gcrypt-util.c \
src/shared/gcrypt-util.h
@ -5312,20 +5295,36 @@ tests += \
manual_tests += \
test-dnssec-complex
test_resolve_tables_SOURCES = \
src/resolve/test-resolve-tables.c \
src/resolve/dns_type-from-name.h \
src/resolve/dns_type-to-name.h \
$(basic_dns_sources) \
src/shared/test-tables.h
test_resolve_tables_LDADD = \
libshared.la
test_dns_packet_SOURCES = \
src/resolve/test-dns-packet.c \
$(basic_dns_sources)
test_dns_packet_LDADD = \
libshared.la
EXTRA_DIST += \
src/resolve/test-data/_openpgpkey.fedoraproject.org.pkts \
src/resolve/test-data/fedoraproject.org.pkts \
src/resolve/test-data/gandi.net.pkts \
src/resolve/test-data/google.com.pkts \
src/resolve/test-data/root.pkts \
src/resolve/test-data/sw1a1aa-sw1a2aa-sw1a2ab-sw1a2ac.find.me.uk.pkts \
src/resolve/test-data/teamits.com.pkts \
src/resolve/test-data/zbyszek@fedoraproject.org.pkts
test_dnssec_SOURCES = \
src/resolve/test-dnssec.c \
src/resolve/resolved-dns-packet.c \
src/resolve/resolved-dns-packet.h \
src/resolve/resolved-dns-rr.c \
src/resolve/resolved-dns-rr.h \
src/resolve/resolved-dns-answer.c \
src/resolve/resolved-dns-answer.h \
src/resolve/resolved-dns-question.c \
src/resolve/resolved-dns-question.h \
src/resolve/resolved-dns-dnssec.c \
src/resolve/resolved-dns-dnssec.h \
src/resolve/dns-type.c \
src/resolve/dns-type.h
$(basic_dns_sources)
test_dnssec_LDADD = \
libshared.la

2
src/resolve/resolved-dns-rr.c
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@ -1302,7 +1302,7 @@ int dns_resource_record_is_synthetic(DnsResourceRecord *rr) {
return !r;
}
static void dns_resource_record_hash_func(const void *i, struct siphash *state) {
void dns_resource_record_hash_func(const void *i, struct siphash *state) {
const DnsResourceRecord *rr = i;
assert(rr);

2
src/resolve/resolved-dns-rr.h
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@ -325,6 +325,8 @@ int dns_resource_record_is_synthetic(DnsResourceRecord *rr);
DnsTxtItem *dns_txt_item_free_all(DnsTxtItem *i);
bool dns_txt_item_equal(DnsTxtItem *a, DnsTxtItem *b);
void dns_resource_record_hash_func(const void *i, struct siphash *state);
extern const struct hash_ops dns_resource_key_hash_ops;
extern const struct hash_ops dns_resource_record_hash_ops;

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@ -0,0 +1,100 @@
/***
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 "alloc-util.h"
#include "fileio.h"
#include "macro.h"
#include "log.h"
#include "resolved-dns-packet.h"
#include "resolved-dns-rr.h"
#include "string-util.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;
log_parse_environment();
for (i = 1; i < argc; i++) {
test_packet_from_file(argv[i], false);
puts("");
test_packet_from_file(argv[i], true);
if (i + 1 < argc)
puts("");
}
return EXIT_SUCCESS;
}