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path: root/src/resolve/resolved-link.c
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Diffstat (limited to 'src/resolve/resolved-link.c')
-rw-r--r--src/resolve/resolved-link.c135
1 files changed, 133 insertions, 2 deletions
diff --git a/src/resolve/resolved-link.c b/src/resolve/resolved-link.c
index e7e5c5f5a7..3f7f9035cf 100644
--- a/src/resolve/resolved-link.c
+++ b/src/resolve/resolved-link.c
@@ -85,6 +85,10 @@ Link *link_free(Link *l) {
if (!l)
return NULL;
+ /* Send goodbye messages. */
+ dns_scope_announce(l->mdns_ipv4_scope, true);
+ dns_scope_announce(l->mdns_ipv6_scope, true);
+
link_flush_settings(l);
while (l->addresses)
@@ -539,7 +543,7 @@ bool link_relevant(Link *l, int family, bool local_multicast) {
* beat, can do multicast and has at least one link-local (or better) IP address.
*
* A link is relevant for non-multicast traffic if it isn't a loopback device, has a link beat, and has at
- * least one routable address.*/
+ * least one routable address. */
if (l->flags & (IFF_LOOPBACK|IFF_DORMANT))
return false;
@@ -665,6 +669,7 @@ int link_address_new(Link *l, LinkAddress **ret, int family, const union in_addr
a->link = l;
LIST_PREPEND(addresses, l->addresses, a);
+ l->n_addresses++;
if (ret)
*ret = a;
@@ -679,6 +684,9 @@ LinkAddress *link_address_free(LinkAddress *a) {
if (a->link) {
LIST_REMOVE(addresses, a->link->addresses, a);
+ assert(a->link->n_addresses > 0);
+ a->link->n_addresses--;
+
if (a->llmnr_address_rr) {
if (a->family == AF_INET && a->link->llmnr_ipv4_scope)
dns_zone_remove_rr(&a->link->llmnr_ipv4_scope->zone, a->llmnr_address_rr);
@@ -692,10 +700,26 @@ LinkAddress *link_address_free(LinkAddress *a) {
else if (a->family == AF_INET6 && a->link->llmnr_ipv6_scope)
dns_zone_remove_rr(&a->link->llmnr_ipv6_scope->zone, a->llmnr_ptr_rr);
}
+
+ if (a->mdns_address_rr) {
+ if (a->family == AF_INET && a->link->mdns_ipv4_scope)
+ dns_zone_remove_rr(&a->link->mdns_ipv4_scope->zone, a->mdns_address_rr);
+ else if (a->family == AF_INET6 && a->link->mdns_ipv6_scope)
+ dns_zone_remove_rr(&a->link->mdns_ipv6_scope->zone, a->mdns_address_rr);
+ }
+
+ if (a->mdns_ptr_rr) {
+ if (a->family == AF_INET && a->link->mdns_ipv4_scope)
+ dns_zone_remove_rr(&a->link->mdns_ipv4_scope->zone, a->mdns_ptr_rr);
+ else if (a->family == AF_INET6 && a->link->mdns_ipv6_scope)
+ dns_zone_remove_rr(&a->link->mdns_ipv6_scope->zone, a->mdns_ptr_rr);
+ }
}
dns_resource_record_unref(a->llmnr_address_rr);
dns_resource_record_unref(a->llmnr_ptr_rr);
+ dns_resource_record_unref(a->mdns_address_rr);
+ dns_resource_record_unref(a->mdns_ptr_rr);
return mfree(a);
}
@@ -746,7 +770,7 @@ void link_address_add_rrs(LinkAddress *a, bool force_remove) {
r = dns_zone_put(&a->link->llmnr_ipv4_scope->zone, a->link->llmnr_ipv4_scope, a->llmnr_ptr_rr, false);
if (r < 0)
- log_warning_errno(r, "Failed to add IPv6 PTR record to LLMNR zone: %m");
+ log_warning_errno(r, "Failed to add IPv4 PTR record to LLMNR zone: %m");
} else {
if (a->llmnr_address_rr) {
if (a->link->llmnr_ipv4_scope)
@@ -760,6 +784,59 @@ void link_address_add_rrs(LinkAddress *a, bool force_remove) {
a->llmnr_ptr_rr = dns_resource_record_unref(a->llmnr_ptr_rr);
}
}
+
+ if (!force_remove &&
+ link_address_relevant(a, true) &&
+ a->link->mdns_ipv4_scope &&
+ a->link->mdns_support == RESOLVE_SUPPORT_YES &&
+ a->link->manager->mdns_support == RESOLVE_SUPPORT_YES) {
+ if (!a->link->manager->mdns_host_ipv4_key) {
+ a->link->manager->mdns_host_ipv4_key = dns_resource_key_new(DNS_CLASS_IN, DNS_TYPE_A, a->link->manager->mdns_hostname);
+ if (!a->link->manager->mdns_host_ipv4_key) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ }
+
+ if (!a->mdns_address_rr) {
+ a->mdns_address_rr = dns_resource_record_new(a->link->manager->mdns_host_ipv4_key);
+ if (!a->mdns_address_rr) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ a->mdns_address_rr->a.in_addr = a->in_addr.in;
+ a->mdns_address_rr->ttl = MDNS_DEFAULT_TTL;
+ }
+
+ if (!a->mdns_ptr_rr) {
+ r = dns_resource_record_new_reverse(&a->mdns_ptr_rr, a->family, &a->in_addr, a->link->manager->mdns_hostname);
+ if (r < 0)
+ goto fail;
+
+ a->mdns_ptr_rr->ttl = MDNS_DEFAULT_TTL;
+ }
+
+ r = dns_zone_put(&a->link->mdns_ipv4_scope->zone, a->link->mdns_ipv4_scope, a->mdns_address_rr, true);
+ if (r < 0)
+ log_warning_errno(r, "Failed to add A record to MDNS zone: %m");
+
+ r = dns_zone_put(&a->link->mdns_ipv4_scope->zone, a->link->mdns_ipv4_scope, a->mdns_ptr_rr, false);
+ if (r < 0)
+ log_warning_errno(r, "Failed to add IPv4 PTR record to MDNS zone: %m");
+ } else {
+ if (a->mdns_address_rr) {
+ if (a->link->mdns_ipv4_scope)
+ dns_zone_remove_rr(&a->link->mdns_ipv4_scope->zone, a->mdns_address_rr);
+ a->mdns_address_rr = dns_resource_record_unref(a->mdns_address_rr);
+ }
+
+ if (a->mdns_ptr_rr) {
+ if (a->link->mdns_ipv4_scope)
+ dns_zone_remove_rr(&a->link->mdns_ipv4_scope->zone, a->mdns_ptr_rr);
+ a->mdns_ptr_rr = dns_resource_record_unref(a->mdns_ptr_rr);
+ }
+ }
}
if (a->family == AF_INET6) {
@@ -817,6 +894,60 @@ void link_address_add_rrs(LinkAddress *a, bool force_remove) {
a->llmnr_ptr_rr = dns_resource_record_unref(a->llmnr_ptr_rr);
}
}
+
+ if (!force_remove &&
+ link_address_relevant(a, true) &&
+ a->link->mdns_ipv6_scope &&
+ a->link->mdns_support == RESOLVE_SUPPORT_YES &&
+ a->link->manager->mdns_support == RESOLVE_SUPPORT_YES) {
+
+ if (!a->link->manager->mdns_host_ipv6_key) {
+ a->link->manager->mdns_host_ipv6_key = dns_resource_key_new(DNS_CLASS_IN, DNS_TYPE_AAAA, a->link->manager->mdns_hostname);
+ if (!a->link->manager->mdns_host_ipv6_key) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ }
+
+ if (!a->mdns_address_rr) {
+ a->mdns_address_rr = dns_resource_record_new(a->link->manager->mdns_host_ipv6_key);
+ if (!a->mdns_address_rr) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ a->mdns_address_rr->aaaa.in6_addr = a->in_addr.in6;
+ a->mdns_address_rr->ttl = MDNS_DEFAULT_TTL;
+ }
+
+ if (!a->mdns_ptr_rr) {
+ r = dns_resource_record_new_reverse(&a->mdns_ptr_rr, a->family, &a->in_addr, a->link->manager->mdns_hostname);
+ if (r < 0)
+ goto fail;
+
+ a->mdns_ptr_rr->ttl = MDNS_DEFAULT_TTL;
+ }
+
+ r = dns_zone_put(&a->link->mdns_ipv6_scope->zone, a->link->mdns_ipv6_scope, a->mdns_address_rr, true);
+ if (r < 0)
+ log_warning_errno(r, "Failed to add AAAA record to MDNS zone: %m");
+
+ r = dns_zone_put(&a->link->mdns_ipv6_scope->zone, a->link->mdns_ipv6_scope, a->mdns_ptr_rr, false);
+ if (r < 0)
+ log_warning_errno(r, "Failed to add IPv6 PTR record to MDNS zone: %m");
+ } else {
+ if (a->mdns_address_rr) {
+ if (a->link->mdns_ipv6_scope)
+ dns_zone_remove_rr(&a->link->mdns_ipv6_scope->zone, a->mdns_address_rr);
+ a->mdns_address_rr = dns_resource_record_unref(a->mdns_address_rr);
+ }
+
+ if (a->mdns_ptr_rr) {
+ if (a->link->mdns_ipv6_scope)
+ dns_zone_remove_rr(&a->link->mdns_ipv6_scope->zone, a->mdns_ptr_rr);
+ a->mdns_ptr_rr = dns_resource_record_unref(a->mdns_ptr_rr);
+ }
+ }
}
return;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2025-06-24 07:14:36 +0000