along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include "string-util.h"
+
const char *af_to_name(int id);
int af_from_name(const char *name);
+static inline const char* af_to_name_short(int id) {
+ const char *f;
+
+ if (id == AF_UNSPEC)
+ return "*";
+
+ f = af_to_name(id);
+ if (!f)
+ return "unknown";
+
+ assert(startswith(f, "AF_"));
+ return f + 3;
+}
+
int af_max(void);
_DNS_CLASS_INVALID = -1
};
+#define _DNS_CLASS_STRING_MAX (sizeof "CLASS" + DECIMAL_STR_MAX(uint16_t))
+#define _DNS_TYPE_STRING_MAX (sizeof "CLASS" + DECIMAL_STR_MAX(uint16_t))
+
bool dns_type_is_pseudo(uint16_t type);
bool dns_type_is_valid_query(uint16_t type);
bool dns_type_is_valid_rr(uint16_t type);
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include <net/if.h>
+
+#include "af-list.h"
#include "alloc-util.h"
#include "dns-domain.h"
#include "resolved-dns-answer.h"
for (;;) {
DnsCacheItem *i;
+ char key_str[DNS_RESOURCE_KEY_STRING_MAX];
i = prioq_peek(c->by_expiry);
if (!i)
break;
/* Depending whether this is an mDNS shared entry
- * either remove only this one RR or the whole
- * RRset */
+ * either remove only this one RR or the whole RRset */
+ log_debug("Removing %scache entry for %s (expired "USEC_FMT"s ago)",
+ i->shared_owner ? "shared " : "",
+ dns_resource_key_to_string(i->key, key_str, sizeof key_str),
+ (t - i->until) / USEC_PER_SEC);
+
if (i->shared_owner)
dns_cache_item_unlink_and_free(c, i);
else {
const union in_addr_union *owner_address) {
_cleanup_(dns_cache_item_freep) DnsCacheItem *i = NULL;
- _cleanup_free_ char *key_str = NULL;
DnsCacheItem *existing;
+ char key_str[DNS_RESOURCE_KEY_STRING_MAX], ifname[IF_NAMESIZE];
int r, k;
assert(c);
/* New TTL is 0? Delete this specific entry... */
if (rr->ttl <= 0) {
k = dns_cache_remove_by_rr(c, rr);
-
- if (log_get_max_level() >= LOG_DEBUG) {
- r = dns_resource_key_to_string(rr->key, &key_str);
- if (r < 0)
- return r;
-
- if (k > 0)
- log_debug("Removed zero TTL entry from cache: %s", key_str);
- else
- log_debug("Not caching zero TTL cache entry: %s", key_str);
- }
-
+ log_debug("%s: %s",
+ k > 0 ? "Removed zero TTL entry from cache" : "Not caching zero TTL cache entry",
+ dns_resource_key_to_string(i->key, key_str, sizeof key_str));
return 0;
}
return r;
if (log_get_max_level() >= LOG_DEBUG) {
- r = dns_resource_key_to_string(i->key, &key_str);
- if (r < 0)
- return r;
-
- log_debug("Added positive cache entry for %s", key_str);
+ _cleanup_free_ char *t = NULL;
+
+ (void) in_addr_to_string(i->owner_family, &i->owner_address, &t);
+
+ log_debug("Added positive %s%s cache entry for %s "USEC_FMT"s on %s/%s/%s",
+ i->authenticated ? "authenticated" : "unauthenticated",
+ i->shared_owner ? " shared" : "",
+ dns_resource_key_to_string(i->key, key_str, sizeof key_str),
+ (i->until - timestamp) / USEC_PER_SEC,
+ i->ifindex == 0 ? "*" : strna(if_indextoname(i->ifindex, ifname)),
+ af_to_name_short(i->owner_family),
+ strna(t));
}
i = NULL;
const union in_addr_union *owner_address) {
_cleanup_(dns_cache_item_freep) DnsCacheItem *i = NULL;
- _cleanup_free_ char *key_str = NULL;
+ char key_str[DNS_RESOURCE_KEY_STRING_MAX];
int r;
assert(c);
return 0;
if (nsec_ttl <= 0 || soa->soa.minimum <= 0 || soa->ttl <= 0) {
- if (log_get_max_level() >= LOG_DEBUG) {
- r = dns_resource_key_to_string(key, &key_str);
- if (r < 0)
- return r;
-
- log_debug("Not caching negative entry with zero SOA/NSEC/NSEC3 TTL: %s", key_str);
- }
-
+ log_debug("Not caching negative entry with zero SOA/NSEC/NSEC3 TTL: %s",
+ dns_resource_key_to_string(i->key, key_str, sizeof key_str));
return 0;
}
if (r < 0)
return r;
- if (log_get_max_level() >= LOG_DEBUG) {
- r = dns_resource_key_to_string(i->key, &key_str);
- if (r < 0)
- return r;
-
- log_debug("Added %s cache entry for %s", i->type == DNS_CACHE_NODATA ? "NODATA" : "NXDOMAIN", key_str);
- }
+ log_debug("Added %s cache entry for %s "USEC_FMT"s",
+ i->type == DNS_CACHE_NODATA ? "NODATA" : "NXDOMAIN",
+ dns_resource_key_to_string(i->key, key_str, sizeof key_str),
+ (i->until - timestamp) / USEC_PER_SEC);
i = NULL;
return 0;
dns_cache_remove_previous(c, key, answer);
if (dns_answer_size(answer) <= 0) {
- if (log_get_max_level() >= LOG_DEBUG) {
- _cleanup_free_ char *key_str = NULL;
-
- r = dns_resource_key_to_string(key, &key_str);
- if (r < 0)
- return r;
-
- log_debug("Not caching negative entry without a SOA record: %s", key_str);
- }
+ char key_str[DNS_RESOURCE_KEY_STRING_MAX];
+ log_debug("Not caching negative entry without a SOA record: %s",
+ dns_resource_key_to_string(key, key_str, sizeof key_str));
return 0;
}
int dns_cache_lookup(DnsCache *c, DnsResourceKey *key, int *rcode, DnsAnswer **ret, bool *authenticated) {
_cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL;
+ char key_str[DNS_RESOURCE_KEY_STRING_MAX];
unsigned n = 0;
int r;
bool nxdomain = false;
- _cleanup_free_ char *key_str = NULL;
DnsCacheItem *j, *first, *nsec = NULL;
bool have_authenticated = false, have_non_authenticated = false;
assert(ret);
assert(authenticated);
- if (key->type == DNS_TYPE_ANY ||
- key->class == DNS_CLASS_ANY) {
-
+ if (key->type == DNS_TYPE_ANY || key->class == DNS_CLASS_ANY) {
/* If we have ANY lookups we don't use the cache, so
* that the caller refreshes via the network. */
- if (log_get_max_level() >= LOG_DEBUG) {
- r = dns_resource_key_to_string(key, &key_str);
- if (r < 0)
- return r;
-
- log_debug("Ignoring cache for ANY lookup: %s", key_str);
- }
+ log_debug("Ignoring cache for ANY lookup: %s",
+ dns_resource_key_to_string(key, key_str, sizeof key_str));
c->n_miss++;
if (!first) {
/* If one question cannot be answered we need to refresh */
- if (log_get_max_level() >= LOG_DEBUG) {
- r = dns_resource_key_to_string(key, &key_str);
- if (r < 0)
- return r;
-
- log_debug("Cache miss for %s", key_str);
- }
+ log_debug("Cache miss for %s",
+ dns_resource_key_to_string(key, key_str, sizeof key_str));
c->n_miss++;
/* Note that we won't derive information for DS RRs from an NSEC, because we only cache NSEC RRs from
* the lower-zone of a zone cut, but the DS RRs are on the upper zone. */
- if (log_get_max_level() >= LOG_DEBUG) {
- r = dns_resource_key_to_string(key, &key_str);
- if (r < 0)
- return r;
-
- log_debug("NSEC NODATA cache hit for %s", key_str);
- }
+ log_debug("NSEC NODATA cache hit for %s",
+ dns_resource_key_to_string(key, key_str, sizeof key_str));
/* We only found an NSEC record that matches our name.
* If it says the type doesn't exist report
return 0;
}
- if (log_get_max_level() >= LOG_DEBUG) {
- r = dns_resource_key_to_string(key, &key_str);
- if (r < 0)
- return r;
-
- log_debug("%s cache hit for %s",
- n > 0 ? "Positive" :
- nxdomain ? "NXDOMAIN" : "NODATA",
- key_str);
- }
+ log_debug("%s cache hit for %s",
+ n > 0 ? "Positive" :
+ nxdomain ? "NXDOMAIN" : "NODATA",
+ dns_resource_key_to_string(key, key_str, sizeof key_str));
if (n <= 0) {
c->n_hit++;
void dns_cache_dump(DnsCache *cache, FILE *f) {
Iterator iterator;
DnsCacheItem *i;
- int r;
if (!cache)
return;
fputs(t, f);
fputc('\n', f);
} else {
- _cleanup_free_ char *z = NULL;
- r = dns_resource_key_to_string(j->key, &z);
- if (r < 0) {
- log_oom();
- continue;
- }
+ char key_str[DNS_RESOURCE_KEY_STRING_MAX];
- fputs(z, f);
+ fputs(dns_resource_key_to_string(j->key, key_str, sizeof key_str), f);
fputs(" -- ", f);
fputs(j->type == DNS_CACHE_NODATA ? "NODATA" : "NXDOMAIN", f);
fputc('\n', f);
DnsResourceKey *key;
bool good = false;
int r;
+ char key_str[DNS_RESOURCE_KEY_STRING_MAX];
assert(m);
q->answer_family = AF_UNSPEC;
/* First dump UTF8 question */
- DNS_QUESTION_FOREACH(key, question_utf8) {
- _cleanup_free_ char *p = NULL;
-
- r = dns_resource_key_to_string(key, &p);
- if (r < 0)
- return r;
-
- log_debug("Looking up RR for %s.", strstrip(p));
- }
+ DNS_QUESTION_FOREACH(key, question_utf8)
+ log_debug("Looking up RR for %s.",
+ dns_resource_key_to_string(key, key_str, sizeof key_str));
/* And then dump the IDNA question, but only what hasn't been dumped already through the UTF8 question. */
DNS_QUESTION_FOREACH(key, question_idna) {
- _cleanup_free_ char *p = NULL;
-
r = dns_question_contains(question_utf8, key);
if (r < 0)
return r;
if (r > 0)
continue;
- r = dns_resource_key_to_string(key, &p);
- if (r < 0)
- return r;
-
- log_debug("Looking up IDNA RR for %s.", strstrip(p));
+ log_debug("Looking up IDNA RR for %s.",
+ dns_resource_key_to_string(key, key_str, sizeof key_str));
}
LIST_PREPEND(queries, m->dns_queries, q);
.compare = dns_resource_key_compare_func
};
-int dns_resource_key_to_string(const DnsResourceKey *key, char **ret) {
- char cbuf[strlen("CLASS") + DECIMAL_STR_MAX(uint16_t)], tbuf[strlen("TYPE") + DECIMAL_STR_MAX(uint16_t)];
+char* dns_resource_key_to_string(const DnsResourceKey *key, char *buf, size_t buf_size) {
const char *c, *t;
- char *s;
+ char *ans = buf;
/* If we cannot convert the CLASS/TYPE into a known string,
use the format recommended by RFC 3597, Section 5. */
c = dns_class_to_string(key->class);
- if (!c) {
- sprintf(cbuf, "CLASS%u", key->class);
- c = cbuf;
- }
-
t = dns_type_to_string(key->type);
- if (!t){
- sprintf(tbuf, "TYPE%u", key->type);
- t = tbuf;
- }
- if (asprintf(&s, "%s %s %-5s", dns_resource_key_name(key), c, t) < 0)
- return -ENOMEM;
+ snprintf(buf, buf_size, "%s %s%s%.0u %s%s%.0u",
+ dns_resource_key_name(key),
+ c ?: "", c ? "" : "CLASS", c ? 0 : key->class,
+ t ?: "", t ? "" : "TYPE", t ? 0 : key->class);
- *ret = s;
- return 0;
+ return ans;
}
bool dns_resource_key_reduce(DnsResourceKey **a, DnsResourceKey **b) {
}
const char *dns_resource_record_to_string(DnsResourceRecord *rr) {
- _cleanup_free_ char *k = NULL, *t = NULL;
- char *s;
+ _cleanup_free_ char *t = NULL;
+ char *s, k[DNS_RESOURCE_KEY_STRING_MAX];
int r;
assert(rr);
if (rr->to_string)
return rr->to_string;
- r = dns_resource_key_to_string(rr->key, &k);
- if (r < 0)
- return NULL;
+ dns_resource_key_to_string(rr->key, k, sizeof(k));
switch (rr->unparseable ? _DNS_TYPE_INVALID : rr->key->type) {
int dns_resource_key_match_rr(const DnsResourceKey *key, DnsResourceRecord *rr, const char *search_domain);
int dns_resource_key_match_cname_or_dname(const DnsResourceKey *key, const DnsResourceKey *cname, const char *search_domain);
int dns_resource_key_match_soa(const DnsResourceKey *key, const DnsResourceKey *soa);
-int dns_resource_key_to_string(const DnsResourceKey *key, char **ret);
+
+/* _DNS_{CLASS,TYPE}_STRING_MAX include one byte for NUL, which we use for space instead below.
+ * DNS_HOSTNAME_MAX does not include the NUL byte, so we need to add 1. */
+#define DNS_RESOURCE_KEY_STRING_MAX (_DNS_CLASS_STRING_MAX + _DNS_TYPE_STRING_MAX + DNS_HOSTNAME_MAX + 1)
+
+char* dns_resource_key_to_string(const DnsResourceKey *key, char *buf, size_t buf_size);
ssize_t dns_resource_record_payload(DnsResourceRecord *rr, void **out);
DEFINE_TRIVIAL_CLEANUP_FUNC(DnsResourceKey*, dns_resource_key_unref);
dns_answer_unref(t->validated_keys);
dns_resource_key_unref(t->key);
- free(t->key_string);
free(t);
return NULL;
static void dns_transaction_tentative(DnsTransaction *t, DnsPacket *p) {
_cleanup_free_ char *pretty = NULL;
+ char key_str[DNS_RESOURCE_KEY_STRING_MAX];
DnsZoneItem *z;
assert(t);
log_debug("Transaction %" PRIu16 " for <%s> on scope %s on %s/%s got tentative packet from %s.",
t->id,
- dns_transaction_key_string(t),
+ dns_resource_key_to_string(t->key, key_str, sizeof key_str),
dns_protocol_to_string(t->scope->protocol),
t->scope->link ? t->scope->link->name : "*",
- t->scope->family == AF_UNSPEC ? "*" : af_to_name(t->scope->family),
+ af_to_name_short(t->scope->family),
pretty);
/* RFC 4795, Section 4.1 says that the peer with the
DnsTransaction *d;
Iterator i;
const char *st;
+ char key_str[DNS_RESOURCE_KEY_STRING_MAX];
assert(t);
assert(!DNS_TRANSACTION_IS_LIVE(state));
- if (state == DNS_TRANSACTION_DNSSEC_FAILED)
+ if (state == DNS_TRANSACTION_DNSSEC_FAILED) {
+ dns_resource_key_to_string(t->key, key_str, sizeof key_str);
+
log_struct(LOG_NOTICE,
LOG_MESSAGE_ID(SD_MESSAGE_DNSSEC_FAILURE),
- LOG_MESSAGE("DNSSEC validation failed for question %s: %s", dns_transaction_key_string(t), dnssec_result_to_string(t->answer_dnssec_result)),
+ LOG_MESSAGE("DNSSEC validation failed for question %s: %s", key_str, dnssec_result_to_string(t->answer_dnssec_result)),
"DNS_TRANSACTION=%" PRIu16, t->id,
- "DNS_QUESTION=%s", dns_transaction_key_string(t),
+ "DNS_QUESTION=%s", key_str,
"DNSSEC_RESULT=%s", dnssec_result_to_string(t->answer_dnssec_result),
"DNS_SERVER=%s", dns_server_string(t->server),
"DNS_SERVER_FEATURE_LEVEL=%s", dns_server_feature_level_to_string(t->server->possible_feature_level),
NULL);
+ }
/* Note that this call might invalidate the query. Callers
* should hence not attempt to access the query or transaction
log_debug("Transaction %" PRIu16 " for <%s> on scope %s on %s/%s now complete with <%s> from %s (%s).",
t->id,
- dns_transaction_key_string(t),
+ dns_resource_key_to_string(t->key, key_str, sizeof key_str),
dns_protocol_to_string(t->scope->protocol),
t->scope->link ? t->scope->link->name : "*",
- t->scope->family == AF_UNSPEC ? "*" : af_to_name(t->scope->family),
+ af_to_name_short(t->scope->family),
st,
t->answer_source < 0 ? "none" : dns_transaction_source_to_string(t->answer_source),
t->answer_authenticated ? "authenticated" : "unsigned");
* might be DS RRs, but we don't know
* them, and the DNS server won't tell
* them to us (and even if it would,
- * we couldn't validate it and trust
- * it). */
+ * we couldn't validate and trust them. */
dns_transaction_complete(t, DNS_TRANSACTION_NO_TRUST_ANCHOR);
return 0;
int dns_transaction_go(DnsTransaction *t) {
usec_t ts;
int r;
+ char key_str[DNS_RESOURCE_KEY_STRING_MAX];
assert(t);
if (r <= 0)
return r;
- log_debug("Excercising transaction %" PRIu16 " for <%s> on scope %s on %s/%s.",
+ log_debug("Transaction %" PRIu16 " for <%s> scope %s on %s/%s.",
t->id,
- dns_transaction_key_string(t),
+ dns_resource_key_to_string(t->key, key_str, sizeof key_str),
dns_protocol_to_string(t->scope->protocol),
t->scope->link ? t->scope->link->name : "*",
- t->scope->family == AF_UNSPEC ? "*" : af_to_name(t->scope->family));
+ af_to_name_short(t->scope->family));
if (!t->initial_jitter_scheduled &&
(t->scope->protocol == DNS_PROTOCOL_LLMNR ||
if (r < 0)
return r;
if (r > 0) {
- log_debug("Detected potential cyclic dependency, refusing to add transaction %" PRIu16 " (%s) as dependency for %" PRIu16 " (%s).",
+ char s[DNS_RESOURCE_KEY_STRING_MAX], saux[DNS_RESOURCE_KEY_STRING_MAX];
+
+ log_debug("Potential cyclic dependency, refusing to add transaction %" PRIu16 " (%s) as dependency for %" PRIu16 " (%s).",
aux->id,
- strna(dns_transaction_key_string(aux)),
+ dns_resource_key_to_string(t->key, s, sizeof s),
t->id,
- strna(dns_transaction_key_string(t)));
+ dns_resource_key_to_string(aux->key, saux, sizeof saux));
+
return -ELOOP;
}
}
const char *name;
Iterator i;
int r;
+ char key_str[DNS_RESOURCE_KEY_STRING_MAX];
assert(t);
* exist, and we are in downgrade mode, hence ignore
* that fact that we didn't get any NSEC RRs.*/
- log_info("Detected a negative query %s in a private DNS zone, permitting unsigned response.", dns_transaction_key_string(t));
+ log_info("Detected a negative query %s in a private DNS zone, permitting unsigned response.",
+ dns_resource_key_to_string(t->key, key_str, sizeof key_str));
return false;
}
if (r < 0)
return r;
if (r > 0) {
- _cleanup_free_ char *s = NULL;
+ char s[DNS_RESOURCE_KEY_STRING_MAX];
/* The data is from a TLD that is proven not to exist, and we are in downgrade
* mode, hence ignore the fact that this was not signed. */
- (void) dns_resource_key_to_string(rr->key, &s);
- log_info("Detected RRset %s is in a private DNS zone, permitting unsigned RRs.", strna(s ? strstrip(s) : NULL));
+ log_info("Detected RRset %s is in a private DNS zone, permitting unsigned RRs.",
+ dns_resource_key_to_string(rr->key, s, sizeof s));
r = dns_answer_move_by_key(validated, &t->answer, rr->key, 0);
if (r < 0)
Phase phase;
DnsAnswerFlags flags;
int r;
+ char key_str[DNS_RESOURCE_KEY_STRING_MAX];
assert(t);
return 0;
}
- log_debug("Validating response from transaction %" PRIu16 " (%s).", t->id, dns_transaction_key_string(t));
+ log_debug("Validating response from transaction %" PRIu16 " (%s).",
+ t->id,
+ dns_resource_key_to_string(t->key, key_str, sizeof key_str));
/* First, see if this response contains any revoked trust
* anchors we care about */
case DNSSEC_NSEC_NXDOMAIN:
/* NSEC proves the domain doesn't exist. Very good. */
- log_debug("Proved NXDOMAIN via NSEC/NSEC3 for transaction %u (%s)", t->id, dns_transaction_key_string(t));
+ log_debug("Proved NXDOMAIN via NSEC/NSEC3 for transaction %u (%s)", t->id, key_str);
t->answer_dnssec_result = DNSSEC_VALIDATED;
t->answer_rcode = DNS_RCODE_NXDOMAIN;
t->answer_authenticated = authenticated;
case DNSSEC_NSEC_NODATA:
/* NSEC proves that there's no data here, very good. */
- log_debug("Proved NODATA via NSEC/NSEC3 for transaction %u (%s)", t->id, dns_transaction_key_string(t));
+ log_debug("Proved NODATA via NSEC/NSEC3 for transaction %u (%s)", t->id, key_str);
t->answer_dnssec_result = DNSSEC_VALIDATED;
t->answer_rcode = DNS_RCODE_SUCCESS;
t->answer_authenticated = authenticated;
case DNSSEC_NSEC_OPTOUT:
/* NSEC3 says the data might not be signed */
- log_debug("Data is NSEC3 opt-out via NSEC/NSEC3 for transaction %u (%s)", t->id, dns_transaction_key_string(t));
+ log_debug("Data is NSEC3 opt-out via NSEC/NSEC3 for transaction %u (%s)", t->id, key_str);
t->answer_dnssec_result = DNSSEC_UNSIGNED;
t->answer_authenticated = false;
return 1;
}
-const char *dns_transaction_key_string(DnsTransaction *t) {
- assert(t);
-
- if (!t->key_string) {
- if (dns_resource_key_to_string(t->key, &t->key_string) < 0)
- return "n/a";
- }
-
- return strstrip(t->key_string);
-}
-
static const char* const dns_transaction_state_table[_DNS_TRANSACTION_STATE_MAX] = {
[DNS_TRANSACTION_NULL] = "null",
[DNS_TRANSACTION_PENDING] = "pending",
DnsScope *scope;
DnsResourceKey *key;
- char *key_string;
DnsTransactionState state;
int dns_transaction_validate_dnssec(DnsTransaction *t);
int dns_transaction_request_dnssec_keys(DnsTransaction *t);
-const char *dns_transaction_key_string(DnsTransaction *t);
-
const char* dns_transaction_state_to_string(DnsTransactionState p) _const_;
DnsTransactionState dns_transaction_state_from_string(const char *s) _pure_;
assert(verdict < _DNSSEC_VERDICT_MAX);
if (log_get_max_level() >= LOG_DEBUG) {
- _cleanup_free_ char *s = NULL;
+ char s[DNS_RESOURCE_KEY_STRING_MAX];
- (void) dns_resource_key_to_string(key, &s);
-
- log_debug("Found verdict for lookup %s: %s", s ? strstrip(s) : "n/a", dnssec_verdict_to_string(verdict));
+ log_debug("Found verdict for lookup %s: %s",
+ dns_resource_key_to_string(key, s, sizeof s),
+ dnssec_verdict_to_string(verdict));
}
m->n_dnssec_verdict[verdict]++;
projects / thirdparty / systemd.git / commitdiff
