return 0;
}
-int dns_packet_append_name(DnsPacket *p, const char *name, size_t *start) {
+int dns_packet_append_name(DnsPacket *p, const char *name,
+ bool allow_compression, size_t *start) {
size_t saved_size;
int r;
while (*name) {
_cleanup_free_ char *s = NULL;
char label[DNS_LABEL_MAX];
- size_t n;
+ size_t n = 0;
int k;
- n = PTR_TO_SIZE(hashmap_get(p->names, name));
+ if (allow_compression)
+ n = PTR_TO_SIZE(hashmap_get(p->names, name));
if (n > 0) {
assert(n < p->size);
if (r < 0)
goto fail;
- r = hashmap_ensure_allocated(&p->names, dns_name_hash_func, dns_name_compare_func);
- if (r < 0)
- goto fail;
+ if (allow_compression) {
+ r = hashmap_ensure_allocated(&p->names, &dns_name_hash_ops);
+ if (r < 0)
+ goto fail;
- r = hashmap_put(p->names, s, SIZE_TO_PTR(n));
- if (r < 0)
- goto fail;
+ r = hashmap_put(p->names, s, SIZE_TO_PTR(n));
+ if (r < 0)
+ goto fail;
- s = NULL;
+ s = NULL;
+ }
}
r = dns_packet_append_uint8(p, 0, NULL);
saved_size = p->size;
- r = dns_packet_append_name(p, DNS_RESOURCE_KEY_NAME(k), NULL);
+ r = dns_packet_append_name(p, DNS_RESOURCE_KEY_NAME(k), true, NULL);
if (r < 0)
goto fail;
if (r < 0)
goto fail;
- r = dns_packet_append_name(p, rr->srv.name, NULL);
+ r = dns_packet_append_name(p, rr->srv.name, true, NULL);
break;
case DNS_TYPE_PTR:
case DNS_TYPE_NS:
case DNS_TYPE_CNAME:
case DNS_TYPE_DNAME:
- r = dns_packet_append_name(p, rr->ptr.name, NULL);
+ r = dns_packet_append_name(p, rr->ptr.name, true, NULL);
break;
case DNS_TYPE_HINFO:
break;
case DNS_TYPE_SOA:
- r = dns_packet_append_name(p, rr->soa.mname, NULL);
+ r = dns_packet_append_name(p, rr->soa.mname, true, NULL);
if (r < 0)
goto fail;
- r = dns_packet_append_name(p, rr->soa.rname, NULL);
+ r = dns_packet_append_name(p, rr->soa.rname, true, NULL);
if (r < 0)
goto fail;
if (r < 0)
goto fail;
- r = dns_packet_append_name(p, rr->mx.exchange, NULL);
+ r = dns_packet_append_name(p, rr->mx.exchange, true, NULL);
break;
case DNS_TYPE_LOC:
r = dns_packet_append_blob(p, rr->dnskey.key, rr->dnskey.key_size, NULL);
break;
+ case DNS_TYPE_RRSIG:
+ r = dns_packet_append_uint16(p, rr->rrsig.type_covered, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_append_uint8(p, rr->rrsig.algorithm, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_append_uint8(p, rr->rrsig.labels, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_append_uint32(p, rr->rrsig.original_ttl, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_append_uint32(p, rr->rrsig.expiration, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_append_uint32(p, rr->rrsig.inception, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_append_uint8(p, rr->rrsig.key_tag, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_append_name(p, rr->rrsig.signer, false, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_append_blob(p, rr->rrsig.signature, rr->rrsig.signature_size, NULL);
+ break;
+
case _DNS_TYPE_INVALID: /* unparseable */
default:
return r;
}
-int dns_packet_read_name(DnsPacket *p, char **_ret, size_t *start) {
+int dns_packet_read_name(DnsPacket *p, char **_ret,
+ bool allow_compression, size_t *start) {
size_t saved_rindex, after_rindex = 0;
_cleanup_free_ char *ret = NULL;
size_t n = 0, allocated = 0;
memcpy(ret + n, t, r);
n += r;
continue;
- } else if ((c & 0xc0) == 0xc0) {
+ } else if (allow_compression && (c & 0xc0) == 0xc0) {
uint16_t ptr;
/* Pointer */
saved_rindex = p->rindex;
- r = dns_packet_read_name(p, &name, NULL);
+ r = dns_packet_read_name(p, &name, true, NULL);
if (r < 0)
goto fail;
}
static int dnskey_parse_flags(DnsResourceRecord *rr, uint16_t flags) {
+ assert(rr);
+
if (flags & ~(DNSKEY_FLAG_SEP | DNSKEY_FLAG_ZONE_KEY))
return -EBADMSG;
r = dns_packet_read_uint16(p, &rr->srv.port, NULL);
if (r < 0)
goto fail;
- r = dns_packet_read_name(p, &rr->srv.name, NULL);
+ r = dns_packet_read_name(p, &rr->srv.name, true, NULL);
break;
case DNS_TYPE_PTR:
case DNS_TYPE_NS:
case DNS_TYPE_CNAME:
case DNS_TYPE_DNAME:
- r = dns_packet_read_name(p, &rr->ptr.name, NULL);
+ r = dns_packet_read_name(p, &rr->ptr.name, true, NULL);
break;
case DNS_TYPE_HINFO:
break;
case DNS_TYPE_SOA:
- r = dns_packet_read_name(p, &rr->soa.mname, NULL);
+ r = dns_packet_read_name(p, &rr->soa.mname, true, NULL);
if (r < 0)
goto fail;
- r = dns_packet_read_name(p, &rr->soa.rname, NULL);
+ r = dns_packet_read_name(p, &rr->soa.rname, true, NULL);
if (r < 0)
goto fail;
if (r < 0)
goto fail;
- r = dns_packet_read_name(p, &rr->mx.exchange, NULL);
+ r = dns_packet_read_name(p, &rr->mx.exchange, true, NULL);
break;
case DNS_TYPE_LOC: {
break;
}
+ case DNS_TYPE_RRSIG:
+ r = dns_packet_read_uint16(p, &rr->rrsig.type_covered, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_read_uint8(p, &rr->rrsig.algorithm, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_read_uint8(p, &rr->rrsig.labels, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_read_uint32(p, &rr->rrsig.original_ttl, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_read_uint32(p, &rr->rrsig.expiration, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_read_uint32(p, &rr->rrsig.inception, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_read_uint16(p, &rr->rrsig.key_tag, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_read_name(p, &rr->rrsig.signer, false, NULL);
+ if (r < 0)
+ goto fail;
+
+ r = dns_packet_read_public_key(p, offset + rdlength - p->rindex,
+ &rr->rrsig.signature, &rr->rrsig.signature_size,
+ NULL);
+ break;
+
default:
unparseable:
r = dns_packet_read(p, rdlength, &d, NULL);
unsigned n, i;
int r;
+ if (p->extracted)
+ return 0;
+
saved_rindex = p->rindex;
dns_packet_rewind(p, DNS_PACKET_HEADER_SIZE);
p->answer = answer;
answer = NULL;
+ p->extracted = true;
+
r = 0;
finish:
[DNS_PROTOCOL_LLMNR] = "llmnr",
};
DEFINE_STRING_TABLE_LOOKUP(dns_protocol, DnsProtocol);
+
+static const char* const dnssec_algorithm_table[_DNSSEC_ALGORITHM_MAX_DEFINED] = {
+ [DNSSEC_ALGORITHM_RSAMD5] = "RSAMD5",
+ [DNSSEC_ALGORITHM_DH] = "DH",
+ [DNSSEC_ALGORITHM_DSA] = "DSA",
+ [DNSSEC_ALGORITHM_ECC] = "ECC",
+ [DNSSEC_ALGORITHM_RSASHA1] = "RSASHA1",
+ [DNSSEC_ALGORITHM_INDIRECT] = "INDIRECT",
+ [DNSSEC_ALGORITHM_PRIVATEDNS] = "PRIVATEDNS",
+ [DNSSEC_ALGORITHM_PRIVATEOID] = "PRIVATEOID",
+};
+DEFINE_STRING_TABLE_LOOKUP(dnssec_algorithm, int);