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Diffstat (limited to 'src/resolve/resolved-dns-scope.c')
-rw-r--r--src/resolve/resolved-dns-scope.c111
1 files changed, 84 insertions, 27 deletions
diff --git a/src/resolve/resolved-dns-scope.c b/src/resolve/resolved-dns-scope.c
index 873d76e40c..fc4ae57ce0 100644
--- a/src/resolve/resolved-dns-scope.c
+++ b/src/resolve/resolved-dns-scope.c
@@ -69,18 +69,12 @@ int dns_scope_new(Manager *m, DnsScope **ret, Link *l, DnsProtocol protocol, int
return 0;
}
-DnsScope* dns_scope_free(DnsScope *s) {
- DnsTransaction *t;
- DnsResourceRecord *rr;
-
- if (!s)
- return NULL;
-
- log_debug("Removing scope on link %s, protocol %s, family %s", s->link ? s->link->name : "*", dns_protocol_to_string(s->protocol), s->family == AF_UNSPEC ? "*" : af_to_name(s->family));
+static void dns_scope_abort_transactions(DnsScope *s) {
+ assert(s);
- dns_scope_llmnr_membership(s, false);
+ while (s->transactions) {
+ DnsTransaction *t = s->transactions;
- while ((t = hashmap_steal_first(s->transactions))) {
/* Abort the transaction, but make sure it is not
* freed while we still look at it */
@@ -90,8 +84,23 @@ DnsScope* dns_scope_free(DnsScope *s) {
dns_transaction_free(t);
}
+}
- hashmap_free(s->transactions);
+DnsScope* dns_scope_free(DnsScope *s) {
+ DnsResourceRecord *rr;
+
+ if (!s)
+ return NULL;
+
+ log_debug("Removing scope on link %s, protocol %s, family %s", s->link ? s->link->name : "*", dns_protocol_to_string(s->protocol), s->family == AF_UNSPEC ? "*" : af_to_name(s->family));
+
+ dns_scope_llmnr_membership(s, false);
+ dns_scope_abort_transactions(s);
+
+ while (s->query_candidates)
+ dns_query_candidate_free(s->query_candidates);
+
+ hashmap_free(s->transactions_by_key);
while ((rr = ordered_hashmap_steal_first(s->conflict_queue)))
dns_resource_record_unref(rr);
@@ -103,7 +112,6 @@ DnsScope* dns_scope_free(DnsScope *s) {
dns_zone_flush(&s->zone);
LIST_REMOVE(scopes, s->manager->dns_scopes, s);
- strv_free(s->domains);
free(s);
return NULL;
@@ -136,11 +144,11 @@ void dns_scope_next_dns_server(DnsScope *s) {
void dns_scope_packet_received(DnsScope *s, usec_t rtt) {
assert(s);
- if (rtt > s->max_rtt) {
- s->max_rtt = rtt;
- s->resend_timeout = MIN(MAX(MULTICAST_RESEND_TIMEOUT_MIN_USEC, s->max_rtt * 2),
- MULTICAST_RESEND_TIMEOUT_MAX_USEC);
- }
+ if (rtt <= s->max_rtt)
+ return;
+
+ s->max_rtt = rtt;
+ s->resend_timeout = MIN(MAX(MULTICAST_RESEND_TIMEOUT_MIN_USEC, s->max_rtt * 2), MULTICAST_RESEND_TIMEOUT_MAX_USEC);
}
void dns_scope_packet_lost(DnsScope *s, usec_t usec) {
@@ -323,7 +331,7 @@ int dns_scope_tcp_socket(DnsScope *s, int family, const union in_addr_union *add
}
DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, const char *domain) {
- char **i;
+ DnsSearchDomain *d;
assert(s);
assert(domain);
@@ -334,7 +342,7 @@ DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, co
if ((SD_RESOLVED_FLAGS_MAKE(s->protocol, s->family) & flags) == 0)
return DNS_SCOPE_NO;
- if (dns_name_root(domain) != 0)
+ if (dns_name_is_root(domain))
return DNS_SCOPE_NO;
/* Never resolve any loopback hostname or IP address via DNS,
@@ -345,15 +353,22 @@ DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, co
dns_name_equal(domain, "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa") > 0)
return DNS_SCOPE_NO;
- STRV_FOREACH(i, s->domains)
- if (dns_name_endswith(domain, *i) > 0)
+ /* Always honour search domains for routing queries. Note that
+ * we return DNS_SCOPE_YES here, rather than just
+ * DNS_SCOPE_MAYBE, which means wildcard scopes won't be
+ * considered anymore. */
+ LIST_FOREACH(domains, d, dns_scope_get_search_domains(s))
+ if (dns_name_endswith(domain, d->name) > 0)
return DNS_SCOPE_YES;
switch (s->protocol) {
+
case DNS_PROTOCOL_DNS:
- if (dns_name_endswith(domain, "254.169.in-addr.arpa") == 0 &&
- dns_name_endswith(domain, "0.8.e.f.ip6.arpa") == 0 &&
- dns_name_single_label(domain) == 0)
+
+ if ((!dns_name_is_single_label(domain) ||
+ (!(flags & SD_RESOLVED_NO_SEARCH) && dns_scope_has_search_domains(s))) &&
+ dns_name_endswith(domain, "254.169.in-addr.arpa") == 0 &&
+ dns_name_endswith(domain, "0.8.e.f.ip6.arpa") == 0)
return DNS_SCOPE_MAYBE;
return DNS_SCOPE_NO;
@@ -371,7 +386,7 @@ DnsScopeMatch dns_scope_good_domain(DnsScope *s, int ifindex, uint64_t flags, co
case DNS_PROTOCOL_LLMNR:
if ((s->family == AF_INET && dns_name_endswith(domain, "in-addr.arpa") > 0) ||
(s->family == AF_INET6 && dns_name_endswith(domain, "ip6.arpa") > 0) ||
- (dns_name_single_label(domain) > 0 && /* only resolve single label names via LLMNR */
+ (dns_name_is_single_label(domain) && /* only resolve single label names via LLMNR */
!is_gateway_hostname(domain) && /* don't resolve "gateway" with LLMNR, let nss-myhostname handle this */
manager_is_own_hostname(s->manager, domain) <= 0)) /* never resolve the local hostname via LLMNR */
return DNS_SCOPE_MAYBE;
@@ -638,7 +653,7 @@ DnsTransaction *dns_scope_find_transaction(DnsScope *scope, DnsResourceKey *key,
/* Try to find an ongoing transaction that is a equal to the
* specified question */
- t = hashmap_get(scope->transactions, key);
+ t = hashmap_get(scope->transactions_by_key, key);
if (!t)
return NULL;
@@ -646,7 +661,7 @@ DnsTransaction *dns_scope_find_transaction(DnsScope *scope, DnsResourceKey *key,
* data instead of a real packet, if that's requested. */
if (!cache_ok &&
IN_SET(t->state, DNS_TRANSACTION_SUCCESS, DNS_TRANSACTION_FAILURE) &&
- !t->received)
+ t->answer_source != DNS_TRANSACTION_NETWORK)
return NULL;
return t;
@@ -850,3 +865,45 @@ void dns_scope_dump(DnsScope *s, FILE *f) {
dns_cache_dump(&s->cache, f);
}
}
+
+DnsSearchDomain *dns_scope_get_search_domains(DnsScope *s) {
+ assert(s);
+
+ /* Returns the list of *local* search domains -- not the
+ * global ones. */
+
+ if (s->protocol != DNS_PROTOCOL_DNS)
+ return NULL;
+
+ if (s->link)
+ return s->link->search_domains;
+
+ return NULL;
+}
+
+bool dns_scope_has_search_domains(DnsScope *s) {
+ assert(s);
+
+ /* Tests if there are *any* search domains suitable for this
+ * scope. This means either local or global ones */
+
+ if (s->protocol != DNS_PROTOCOL_DNS)
+ return false;
+
+ if (s->manager->search_domains)
+ return true;
+
+ if (s->link && s->link->search_domains)
+ return true;
+
+ return false;
+}
+
+bool dns_scope_name_needs_search_domain(DnsScope *s, const char *name) {
+ assert(s);
+
+ if (s->protocol != DNS_PROTOCOL_DNS)
+ return false;
+
+ return dns_name_is_single_label(name);
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-17 08:31:19 +0000