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/* Copyright (C) CZ.NIC, z.s.p.o. and contributors
* SPDX-License-Identifier: GPL-2.0-or-later
* For more information, see <https://www.knot-dns.cz/>
*/
#include <assert.h>
#include <tap/basic.h>
#include "libknot/packet/rrset-wire.h"
#include "libknot/descriptor.h"
#include "libknot/errcode.h"
// Wire initializers
#define MESSAGE_HEADER(AN, AUTH, ADD) 0xd4, 0xec, 0x81, 0xa0, 0x00, 0x01, \
0x00, AN, 0x00, AUTH, 0x00, ADD
#define QUERY(qname, type) qname, 0x00, type, 0x00, 0x01
#define RR_HEADER(owner, type, rdlength0, rdlength1) owner, 0x00, type, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, rdlength0, rdlength1
#define QNAME_POINTER 0xc0, 0x0c
// Initializers' sizes
#define QUERY_SIZE 12 + 4
#define RR_HEADER_SIZE 10
// Sample domain names
#define QNAME 0x03, 0x6e, 0x69, 0x63, 0x02, 0x63, 0x7a, 0x00
#define QNAME_SIZE 8
#define QNAME_LONG \
0x3f,'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', \
'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', \
'z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', \
'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'w', 'y', \
'z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 0x3f,\
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', \
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', \
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', \
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'x', 'x', 'y', 'z', \
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 0x3f,'a', \
'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', \
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'a', \
'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', \
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'x', 'x', 'y', 'z', 'a', \
'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'i', 'k', 0x3d,'a', 'b', \
'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', \
'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'a', 'b', \
'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', \
'p', 'q', 'r', 's', 't', 'u', 'v', 'x', 'x', 'y', 'z', 'a', 'b', \
'c', 'd', 'e', 'f', 'g', 'h', 'i', 0x00
#define QNAME_LONG_SIZE 255
#define POINTER_SIZE 2
struct wire_data {
uint8_t wire[65535];
size_t size;
size_t pos;
int code;
const char *msg;
};
#define FROM_CASE_COUNT 17
static const struct wire_data FROM_CASES[FROM_CASE_COUNT] = {
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_A)},
.size = QUERY_SIZE + QNAME_SIZE,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EMALF,
.msg = "No header" },
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_A), 0x00, 0x00, 0x01},
.size = QUERY_SIZE + QNAME_SIZE + 3,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EMALF,
.msg = "Partial header" },
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_A),
RR_HEADER(QNAME, KNOT_RRTYPE_A, 0x00, 0x04) },
.size = QUERY_SIZE + RR_HEADER_SIZE + QNAME_SIZE * 2,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EMALF,
.msg = "No RDATA" },
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_A),
RR_HEADER(QNAME, KNOT_RRTYPE_A, 0x00, 0x04), 0x01 },
.size = QUERY_SIZE + RR_HEADER_SIZE + QNAME_SIZE * 2 + 1,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EMALF,
.msg = "Partial RDATA" },
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_A),
RR_HEADER(QNAME, KNOT_RRTYPE_A, 0x00, 0x04), 0x01, 0x02, 0x03, 0x04 },
.size = QUERY_SIZE + RR_HEADER_SIZE + QNAME_SIZE * 2 + 4,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EOK,
.msg = "OK RDATA" },
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_A),
RR_HEADER(QNAME, KNOT_RRTYPE_A, 0x00, 0x05), 0x01, 0x02, 0x03, 0x04, 0x05 },
.size = QUERY_SIZE + RR_HEADER_SIZE + QNAME_SIZE * 2 + 5,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EMALF,
.msg = "Trailing RDATA" },
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME_LONG, KNOT_RRTYPE_SOA),
RR_HEADER(QNAME_POINTER, KNOT_RRTYPE_SOA, 0x00, 0x18), QNAME_POINTER, QNAME_POINTER,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
.size = QUERY_SIZE + RR_HEADER_SIZE + QNAME_LONG_SIZE + 6 + 20,
.pos = QUERY_SIZE + QNAME_LONG_SIZE,
.code = KNOT_EOK,
.msg = "Max DNAME" },
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_SIG),
RR_HEADER(QNAME_POINTER, KNOT_RRTYPE_SIG, 0xff, 0xdb),
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, QNAME },
.size = 65535,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EOK,
.msg = "Max RDLENGTH" },
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME_LONG, KNOT_RRTYPE_SIG),
RR_HEADER(QNAME_POINTER, KNOT_RRTYPE_SIG, 0xff, 0xff),
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, QNAME_POINTER },
.size = 65535 + QNAME_LONG_SIZE + QUERY_SIZE + RR_HEADER_SIZE + 2,
.pos = QUERY_SIZE + QNAME_LONG_SIZE,
.code = KNOT_EMALF,
.msg = "Max RDLENGTH + compression"},
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_NSEC),
RR_HEADER(QNAME_POINTER, KNOT_RRTYPE_NSEC, 0x00, 0x03),
QNAME_POINTER, 0x00},
.size = QUERY_SIZE + QNAME_SIZE + RR_HEADER_SIZE + 2 + 2 + 1,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EOK,
.msg = "DNAME wrong compression"},
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_NAPTR),
RR_HEADER(QNAME_POINTER, KNOT_RRTYPE_NAPTR, 0x00, 0x01),
0x00},
.size = QUERY_SIZE + QNAME_SIZE + RR_HEADER_SIZE + 2 + 1,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EMALF,
.msg = "NAPTR missing header"},
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_NAPTR),
RR_HEADER(QNAME_POINTER, KNOT_RRTYPE_NAPTR, 0x00, 0x09),
0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, QNAME_POINTER},
.size = QUERY_SIZE + QNAME_SIZE + RR_HEADER_SIZE + 2 + 9,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EMALF,
.msg = "NAPTR bad offset"},
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_NAPTR),
RR_HEADER(QNAME_POINTER, KNOT_RRTYPE_NAPTR, 0x00, 0x09),
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
.size = QUERY_SIZE + QNAME_SIZE + RR_HEADER_SIZE + 2 + 7,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EMALF,
.msg = "NAPTR no DNAME"},
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_NAPTR),
RR_HEADER(QNAME_POINTER, KNOT_RRTYPE_NAPTR, 0x00, 0x0c),
0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0x01, 0xff, 0x01, 0xff, QNAME_POINTER},
.size = QUERY_SIZE + QNAME_SIZE + RR_HEADER_SIZE + 2 + 10 + 2,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EOK,
.msg = "NAPTR valid"},
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_APL),
RR_HEADER(QNAME_POINTER, KNOT_RRTYPE_APL, 0x00, 0x00) },
.size = QUERY_SIZE + QNAME_SIZE + RR_HEADER_SIZE + 2,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EOK,
.msg = "Valid 0 RDATA"},
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_TXT),
RR_HEADER(QNAME_POINTER, KNOT_RRTYPE_TXT, 0x00, 0x00) },
.size = QUERY_SIZE + QNAME_SIZE + RR_HEADER_SIZE + 2,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EMALF,
.msg = "Invalid 0 RDATA"},
{ .wire = { MESSAGE_HEADER(1, 0, 0), QUERY(QNAME, KNOT_RRTYPE_PX),
RR_HEADER(QNAME_POINTER, KNOT_RRTYPE_PX, 0x00, 0x06),
0x00, 0x00, QNAME_POINTER, QNAME_POINTER },
.size = QUERY_SIZE + QNAME_SIZE + RR_HEADER_SIZE + 2 + 6,
.pos = QUERY_SIZE + QNAME_SIZE,
.code = KNOT_EOK,
.msg = "Obsolete RR type"},
};
#define TEST_CASE_FROM(rrset, i) size_t _pos##i = FROM_CASES[i].pos; \
ok(knot_rrset_rr_from_wire(FROM_CASES[i].wire, &_pos##i, FROM_CASES[i].size, \
rrset, NULL, true) == FROM_CASES[i].code, "rrset wire: %s", FROM_CASES[i].msg)
static void test_inputs(void)
{
for (size_t i = 0; i < FROM_CASE_COUNT; ++i) {
knot_rrset_t rrset;
knot_rrset_init_empty(&rrset);
TEST_CASE_FROM(&rrset, i);
knot_rrset_clear(&rrset, NULL);
}
}
static void check_canon(uint8_t *wire, size_t size, size_t pos, bool canon,
knot_dname_t *qname, knot_dname_t *dname)
{
knot_rrset_t rrset;
knot_rrset_init_empty(&rrset);
int ret = knot_rrset_rr_from_wire(wire, &pos, size, &rrset, NULL, canon);
is_int(KNOT_EOK, ret, "OK %s canonization", canon ? "with" : "without");
ok(memcmp(rrset.owner, qname, knot_dname_size(qname)) == 0, "compare owner");
uint8_t *rdata = rrset.rrs.rdata->data;
ok(memcmp(rdata, dname, knot_dname_size(dname)) == 0, "compare rdata dname");
knot_rrset_clear(&rrset, NULL);
}
static void test_canonization(void)
{
#define UPP_QNAME_SIZE 5
#define UPP_QNAME 0x01, 0x41, 0x01, 0x5a, 0x00 // A.Z.
#define LOW_QNAME 0x01, 0x61, 0x01, 0x7a, 0x00 // a.z.
#define UPP_DNAME_SIZE 3
#define UPP_DNAME 0x01, 0x58, 0x00 // X.
#define LOW_DNAME 0x01, 0x78, 0x00 // x.
uint8_t wire[] = {
MESSAGE_HEADER(1, 0, 0), QUERY(UPP_QNAME, KNOT_RRTYPE_NS),
RR_HEADER(UPP_QNAME, KNOT_RRTYPE_NS, 0x00, UPP_DNAME_SIZE), UPP_DNAME
};
size_t size = QUERY_SIZE + RR_HEADER_SIZE + UPP_QNAME_SIZE * 2 + UPP_DNAME_SIZE;
size_t pos = QUERY_SIZE + UPP_QNAME_SIZE;
knot_dname_t upp_qname[] = { UPP_QNAME };
knot_dname_t upp_dname[] = { UPP_DNAME };
check_canon(wire, size, pos, false, upp_qname, upp_dname);
knot_dname_t low_qname[] = { LOW_QNAME };
knot_dname_t low_dname[] = { LOW_DNAME };
check_canon(wire, size, pos, true, low_qname, low_dname);
}
int main(int argc, char *argv[])
{
plan_lazy();
diag("Test NULL parameters");
int ret = knot_rrset_rr_from_wire(NULL, NULL, 0, NULL, NULL, true);
is_int(KNOT_EINVAL, ret, "rr wire: Invalid params");
diag("Test various inputs");
test_inputs();
diag("Test canonization");
test_canonization();
return 0;
}
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