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authorLennart Poettering <lennart@poettering.net>2015-12-18 20:09:30 +0100
committerLennart Poettering <lennart@poettering.net>2015-12-18 20:09:30 +0100
commit019036a47fcd10fcf0286800d144c706f3773e2f (patch)
tree77f62fa9d00461c3299ad0d1fafe555414726d18
parent3bbdc31df37a23b5134a115c01d15e7ff870b3cc (diff)
resolved: propagate the DNSSEC result from the transaction to the query and the the bus client
It's useful to generate useful errors, so let's do that.
-rw-r--r--src/resolve/resolved-bus.c3
-rw-r--r--src/resolve/resolved-dns-query.c29
-rw-r--r--src/resolve/resolved-dns-query.h3
-rw-r--r--src/resolve/resolved-dns-transaction.c30
-rw-r--r--src/resolve/resolved-dns-transaction.h2
5 files changed, 39 insertions, 28 deletions
diff --git a/src/resolve/resolved-bus.c b/src/resolve/resolved-bus.c
index cda16b4730..af08a0555d 100644
--- a/src/resolve/resolved-bus.c
+++ b/src/resolve/resolved-bus.c
@@ -61,7 +61,8 @@ static int reply_query_state(DnsQuery *q) {
return sd_bus_reply_method_errorf(q->request, BUS_ERROR_ABORTED, "Query aborted");
case DNS_TRANSACTION_DNSSEC_FAILED:
- return sd_bus_reply_method_errorf(q->request, BUS_ERROR_ABORTED, "DNSSEC validation failed");
+ return sd_bus_reply_method_errorf(q->request, BUS_ERROR_ABORTED, "DNSSEC validation failed: %s",
+ dnssec_result_to_string(q->answer_dnssec_result));
case DNS_TRANSACTION_RCODE_FAILURE: {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
diff --git a/src/resolve/resolved-dns-query.c b/src/resolve/resolved-dns-query.c
index 7e4aee2a27..18d2d01bf2 100644
--- a/src/resolve/resolved-dns-query.c
+++ b/src/resolve/resolved-dns-query.c
@@ -986,6 +986,7 @@ fail:
static void dns_query_accept(DnsQuery *q, DnsQueryCandidate *c) {
DnsTransactionState state = DNS_TRANSACTION_NO_SERVERS;
bool has_authenticated = false, has_non_authenticated = false;
+ DnssecResult dnssec_result_authenticated = _DNSSEC_RESULT_INVALID, dnssec_result_non_authenticated = _DNSSEC_RESULT_INVALID;
DnsTransaction *t;
Iterator i;
int r;
@@ -1009,12 +1010,16 @@ static void dns_query_accept(DnsQuery *q, DnsQueryCandidate *c) {
dns_query_complete(q, DNS_TRANSACTION_RESOURCES);
return;
}
+
q->answer_rcode = t->answer_rcode;
- if (t->answer_authenticated)
+ if (t->answer_authenticated) {
has_authenticated = true;
- else
+ dnssec_result_authenticated = t->answer_dnssec_result;
+ } else {
has_non_authenticated = true;
+ dnssec_result_non_authenticated = t->answer_dnssec_result;
+ }
state = DNS_TRANSACTION_SUCCESS;
break;
@@ -1031,22 +1036,26 @@ static void dns_query_accept(DnsQuery *q, DnsQueryCandidate *c) {
/* Any kind of failure? Store the data away,
* if there's nothing stored yet. */
- if (state != DNS_TRANSACTION_SUCCESS) {
-
- dns_answer_unref(q->answer);
- q->answer = dns_answer_ref(t->answer);
- q->answer_rcode = t->answer_rcode;
+ if (state == DNS_TRANSACTION_SUCCESS)
+ continue;
- state = t->state;
- }
+ dns_answer_unref(q->answer);
+ q->answer = dns_answer_ref(t->answer);
+ q->answer_rcode = t->answer_rcode;
+ q->answer_dnssec_result = t->answer_dnssec_result;
+ state = t->state;
break;
}
}
+ if (state == DNS_TRANSACTION_SUCCESS) {
+ q->answer_authenticated = has_authenticated && !has_non_authenticated;
+ q->answer_dnssec_result = q->answer_authenticated ? dnssec_result_authenticated : dnssec_result_non_authenticated;
+ }
+
q->answer_protocol = c->scope->protocol;
q->answer_family = c->scope->family;
- q->answer_authenticated = has_authenticated && !has_non_authenticated;
dns_search_domain_unref(q->answer_search_domain);
q->answer_search_domain = dns_search_domain_ref(c->search_domain);
diff --git a/src/resolve/resolved-dns-query.h b/src/resolve/resolved-dns-query.h
index d7f96c3ca4..44edd5bfff 100644
--- a/src/resolve/resolved-dns-query.h
+++ b/src/resolve/resolved-dns-query.h
@@ -72,10 +72,11 @@ struct DnsQuery {
/* Discovered data */
DnsAnswer *answer;
int answer_rcode;
+ DnssecResult answer_dnssec_result;
+ bool answer_authenticated;
DnsProtocol answer_protocol;
int answer_family;
DnsSearchDomain *answer_search_domain;
- bool answer_authenticated;
/* Bus client information */
sd_bus_message *request;
diff --git a/src/resolve/resolved-dns-transaction.c b/src/resolve/resolved-dns-transaction.c
index 893ffa9ffe..9a4dcfd74a 100644
--- a/src/resolve/resolved-dns-transaction.c
+++ b/src/resolve/resolved-dns-transaction.c
@@ -129,7 +129,7 @@ int dns_transaction_new(DnsTransaction **ret, DnsScope *s, DnsResourceKey *key)
t->dns_udp_fd = -1;
t->answer_source = _DNS_TRANSACTION_SOURCE_INVALID;
- t->dnssec_result = _DNSSEC_RESULT_INVALID;
+ t->answer_dnssec_result = _DNSSEC_RESULT_INVALID;
t->key = dns_resource_key_ref(key);
/* Find a fresh, unused transaction id */
@@ -463,7 +463,7 @@ static void dns_transaction_process_dnssec(DnsTransaction *t) {
return;
}
- if (!IN_SET(t->dnssec_result,
+ if (!IN_SET(t->answer_dnssec_result,
_DNSSEC_RESULT_INVALID, /* No DNSSEC validation enabled */
DNSSEC_VALIDATED, /* Answer is signed and validated successfully */
DNSSEC_UNSIGNED)) { /* Answer is right-fully unsigned */
@@ -1611,7 +1611,7 @@ void dns_transaction_notify(DnsTransaction *t, DnsTransaction *source) {
return;
fail:
- t->dnssec_result = DNSSEC_FAILED_AUXILIARY;
+ t->answer_dnssec_result = DNSSEC_FAILED_AUXILIARY;
dns_transaction_complete(t, DNS_TRANSACTION_DNSSEC_FAILED);
}
@@ -1852,12 +1852,12 @@ int dns_transaction_validate_dnssec(DnsTransaction *t) {
return 0;
/* Already validated */
- if (t->dnssec_result != _DNSSEC_RESULT_INVALID)
+ if (t->answer_dnssec_result != _DNSSEC_RESULT_INVALID)
return 0;
/* Our own stuff needs no validation */
if (IN_SET(t->answer_source, DNS_TRANSACTION_ZONE, DNS_TRANSACTION_TRUST_ANCHOR)) {
- t->dnssec_result = DNSSEC_VALIDATED;
+ t->answer_dnssec_result = DNSSEC_VALIDATED;
t->answer_authenticated = true;
return 0;
}
@@ -1950,7 +1950,7 @@ int dns_transaction_validate_dnssec(DnsTransaction *t) {
* to our question, and it
* failed validation. That's
* fatal. */
- t->dnssec_result = result;
+ t->answer_dnssec_result = result;
return 0;
}
@@ -1999,12 +1999,12 @@ int dns_transaction_validate_dnssec(DnsTransaction *t) {
if (flags & DNS_ANSWER_AUTHENTICATED) {
/* The answer is fully authenticated, yay. */
- t->dnssec_result = DNSSEC_VALIDATED;
+ t->answer_dnssec_result = DNSSEC_VALIDATED;
t->answer_rcode = DNS_RCODE_SUCCESS;
t->answer_authenticated = true;
} else {
/* The answer is not fully authenticated. */
- t->dnssec_result = DNSSEC_UNSIGNED;
+ t->answer_dnssec_result = DNSSEC_UNSIGNED;
t->answer_authenticated = false;
}
@@ -2021,7 +2021,7 @@ int dns_transaction_validate_dnssec(DnsTransaction *t) {
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));
- t->dnssec_result = DNSSEC_VALIDATED;
+ t->answer_dnssec_result = DNSSEC_VALIDATED;
t->answer_rcode = DNS_RCODE_NXDOMAIN;
t->answer_authenticated = true;
break;
@@ -2029,7 +2029,7 @@ int dns_transaction_validate_dnssec(DnsTransaction *t) {
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));
- t->dnssec_result = DNSSEC_VALIDATED;
+ t->answer_dnssec_result = DNSSEC_VALIDATED;
t->answer_rcode = DNS_RCODE_SUCCESS;
t->answer_authenticated = true;
break;
@@ -2037,7 +2037,7 @@ int dns_transaction_validate_dnssec(DnsTransaction *t) {
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));
- t->dnssec_result = DNSSEC_UNSIGNED;
+ t->answer_dnssec_result = DNSSEC_UNSIGNED;
t->answer_authenticated = false;
break;
@@ -2048,9 +2048,9 @@ int dns_transaction_validate_dnssec(DnsTransaction *t) {
if (r < 0)
return r;
if (r > 0)
- t->dnssec_result = DNSSEC_NO_SIGNATURE;
+ t->answer_dnssec_result = DNSSEC_NO_SIGNATURE;
else {
- t->dnssec_result = DNSSEC_UNSIGNED;
+ t->answer_dnssec_result = DNSSEC_UNSIGNED;
t->answer_authenticated = false;
}
@@ -2058,12 +2058,12 @@ int dns_transaction_validate_dnssec(DnsTransaction *t) {
case DNSSEC_NSEC_UNSUPPORTED_ALGORITHM:
/* We don't know the NSEC3 algorithm used? */
- t->dnssec_result = DNSSEC_UNSUPPORTED_ALGORITHM;
+ t->answer_dnssec_result = DNSSEC_UNSUPPORTED_ALGORITHM;
break;
case DNSSEC_NSEC_FOUND:
/* NSEC says it needs to be there, but we couldn't find it? Bummer! */
- t->dnssec_result = DNSSEC_NSEC_MISMATCH;
+ t->answer_dnssec_result = DNSSEC_NSEC_MISMATCH;
break;
default:
diff --git a/src/resolve/resolved-dns-transaction.h b/src/resolve/resolved-dns-transaction.h
index a1a6ffed99..fea25aab09 100644
--- a/src/resolve/resolved-dns-transaction.h
+++ b/src/resolve/resolved-dns-transaction.h
@@ -65,7 +65,6 @@ struct DnsTransaction {
char *key_string;
DnsTransactionState state;
- DnssecResult dnssec_result;
uint16_t id;
@@ -76,6 +75,7 @@ struct DnsTransaction {
DnsAnswer *answer;
int answer_rcode;
+ DnssecResult answer_dnssec_result;
DnsTransactionSource answer_source;
/* Indicates whether the primary answer is authenticated,