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Diffstat (limited to 'src/resolve/resolved-dns-transaction.c')
-rw-r--r--src/resolve/resolved-dns-transaction.c83
1 files changed, 45 insertions, 38 deletions
diff --git a/src/resolve/resolved-dns-transaction.c b/src/resolve/resolved-dns-transaction.c
index 02269498c9..0aeb3b0f4a 100644
--- a/src/resolve/resolved-dns-transaction.c
+++ b/src/resolve/resolved-dns-transaction.c
@@ -24,6 +24,7 @@
#include "af-list.h"
#include "alloc-util.h"
#include "dns-domain.h"
+#include "errno-list.h"
#include "fd-util.h"
#include "random-util.h"
#include "resolved-dns-cache.h"
@@ -43,6 +44,7 @@ static void dns_transaction_reset_answer(DnsTransaction *t) {
t->answer_source = _DNS_TRANSACTION_SOURCE_INVALID;
t->answer_authenticated = false;
t->answer_nsec_ttl = (uint32_t) -1;
+ t->answer_errno = 0;
}
static void dns_transaction_flush_dnssec_transactions(DnsTransaction *t) {
@@ -285,6 +287,7 @@ void dns_transaction_complete(DnsTransaction *t, DnsTransactionState state) {
DnsZoneItem *z;
DnsTransaction *d;
Iterator i;
+ const char *st;
assert(t);
assert(!DNS_TRANSACTION_IS_LIVE(state));
@@ -304,13 +307,18 @@ void dns_transaction_complete(DnsTransaction *t, DnsTransactionState state) {
* should hence not attempt to access the query or transaction
* after calling this function. */
+ if (state == DNS_TRANSACTION_ERRNO)
+ st = errno_to_name(t->answer_errno);
+ else
+ st = dns_transaction_state_to_string(state);
+
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_protocol_to_string(t->scope->protocol),
t->scope->link ? t->scope->link->name : "*",
t->scope->family == AF_UNSPEC ? "*" : af_to_name(t->scope->family),
- dns_transaction_state_to_string(state),
+ st,
t->answer_source < 0 ? "none" : dns_transaction_source_to_string(t->answer_source),
t->answer_authenticated ? "authenticated" : "unsigned");
@@ -393,8 +401,10 @@ static void dns_transaction_retry(DnsTransaction *t) {
dns_scope_next_dns_server(t->scope);
r = dns_transaction_go(t);
- if (r < 0)
- dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
+ if (r < 0) {
+ t->answer_errno = -r;
+ dns_transaction_complete(t, DNS_TRANSACTION_ERRNO);
+ }
}
static int dns_transaction_maybe_restart(DnsTransaction *t) {
@@ -449,7 +459,8 @@ static int on_stream_complete(DnsStream *s, int error) {
return 0;
}
if (error != 0) {
- dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
+ t->answer_errno = error;
+ dns_transaction_complete(t, DNS_TRANSACTION_ERRNO);
return 0;
}
@@ -664,20 +675,16 @@ static void dns_transaction_process_dnssec(DnsTransaction *t) {
/* Are there ongoing DNSSEC transactions? If so, let's wait for them. */
r = dns_transaction_dnssec_ready(t);
- if (r < 0) {
- dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
- return;
- }
+ if (r < 0)
+ goto fail;
if (r == 0) /* We aren't ready yet (or one of our auxiliary transactions failed, and we shouldn't validate now */
return;
/* See if we learnt things from the additional DNSSEC transactions, that we didn't know before, and better
* restart the lookup immediately. */
r = dns_transaction_maybe_restart(t);
- if (r < 0) {
- dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
- return;
- }
+ if (r < 0)
+ goto fail;
if (r > 0) /* Transaction got restarted... */
return;
@@ -688,10 +695,8 @@ static void dns_transaction_process_dnssec(DnsTransaction *t) {
dns_transaction_complete(t, DNS_TRANSACTION_INVALID_REPLY);
return;
}
- if (r < 0) {
- dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
- return;
- }
+ if (r < 0)
+ goto fail;
if (t->answer_dnssec_result == DNSSEC_INCOMPATIBLE_SERVER &&
t->scope->dnssec_mode == DNSSEC_YES) {
@@ -719,6 +724,12 @@ static void dns_transaction_process_dnssec(DnsTransaction *t) {
dns_transaction_complete(t, DNS_TRANSACTION_SUCCESS);
else
dns_transaction_complete(t, DNS_TRANSACTION_RCODE_FAILURE);
+
+ return;
+
+fail:
+ t->answer_errno = -r;
+ dns_transaction_complete(t, DNS_TRANSACTION_ERRNO);
}
void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) {
@@ -862,10 +873,8 @@ void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) {
if (r < 0) {
/* On LLMNR, if we cannot connect to the host,
* we immediately give up */
- if (t->scope->protocol != DNS_PROTOCOL_DNS) {
- dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
- return;
- }
+ if (t->scope->protocol != DNS_PROTOCOL_DNS)
+ goto fail;
/* On DNS, couldn't send? Try immediately again, with a new server */
dns_transaction_retry(t);
@@ -891,10 +900,8 @@ void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) {
/* See if we know things we didn't know before that indicate we better restart the lookup immediately. */
r = dns_transaction_maybe_restart(t);
- if (r < 0) {
- dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
- return;
- }
+ if (r < 0)
+ goto fail;
if (r > 0) /* Transaction got restarted... */
return;
@@ -902,10 +909,8 @@ void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) {
/* Only consider responses with equivalent query section to the request */
r = dns_packet_is_reply_for(p, t->key);
- if (r < 0) {
- dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
- return;
- }
+ if (r < 0)
+ goto fail;
if (r == 0) {
dns_transaction_complete(t, DNS_TRANSACTION_INVALID_REPLY);
return;
@@ -934,10 +939,8 @@ void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) {
* quickly. */
if (t->state != DNS_TRANSACTION_PENDING)
return;
- if (r < 0) {
- dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
- return;
- }
+ if (r < 0)
+ goto fail;
if (r > 0) {
/* There are DNSSEC transactions pending now. Update the state accordingly. */
t->state = DNS_TRANSACTION_VALIDATING;
@@ -948,6 +951,11 @@ void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) {
}
dns_transaction_process_dnssec(t);
+ return;
+
+fail:
+ t->answer_errno = -r;
+ dns_transaction_complete(t, DNS_TRANSACTION_ERRNO);
}
static int on_dns_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
@@ -973,7 +981,8 @@ static int on_dns_packet(sd_event_source *s, int fd, uint32_t revents, void *use
return 0;
}
if (r < 0) {
- dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
+ dns_transaction_complete(t, DNS_TRANSACTION_ERRNO);
+ t->answer_errno = -r;
return 0;
}
@@ -1482,10 +1491,8 @@ int dns_transaction_go(DnsTransaction *t) {
return 0;
}
if (r < 0) {
- if (t->scope->protocol != DNS_PROTOCOL_DNS) {
- dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
- return 0;
- }
+ if (t->scope->protocol != DNS_PROTOCOL_DNS)
+ return r;
/* Couldn't send? Try immediately again, with a new server */
dns_scope_next_dns_server(t->scope);
@@ -3001,7 +3008,7 @@ static const char* const dns_transaction_state_table[_DNS_TRANSACTION_STATE_MAX]
[DNS_TRANSACTION_TIMEOUT] = "timeout",
[DNS_TRANSACTION_ATTEMPTS_MAX_REACHED] = "attempts-max-reached",
[DNS_TRANSACTION_INVALID_REPLY] = "invalid-reply",
- [DNS_TRANSACTION_RESOURCES] = "resources",
+ [DNS_TRANSACTION_ERRNO] = "errno",
[DNS_TRANSACTION_ABORTED] = "aborted",
[DNS_TRANSACTION_DNSSEC_FAILED] = "dnssec-failed",
[DNS_TRANSACTION_NO_TRUST_ANCHOR] = "no-trust-anchor",
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-17 12:27:21 +0000