summaryrefslogtreecommitdiff
path: root/src/resolve/resolved-link.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/resolve/resolved-link.c')
-rw-r--r--src/resolve/resolved-link.c142
1 files changed, 137 insertions, 5 deletions
diff --git a/src/resolve/resolved-link.c b/src/resolve/resolved-link.c
index 3c6c757722..6ac7c5be98 100644
--- a/src/resolve/resolved-link.c
+++ b/src/resolve/resolved-link.c
@@ -25,6 +25,10 @@
#include "strv.h"
#include "resolved-link.h"
+#define DEFAULT_TTL (10)
+
+static void link_address_add_rrs(LinkAddress *a);
+
int link_new(Manager *m, Link **ret, int ifindex) {
_cleanup_(link_freep) Link *l = NULL;
int r;
@@ -110,6 +114,13 @@ static void link_allocate_scopes(Link *l) {
l->llmnr_ipv6_scope = dns_scope_free(l->llmnr_ipv6_scope);
}
+static void link_add_rrs(Link *l) {
+ LinkAddress *a;
+
+ LIST_FOREACH(addresses, a, l->addresses)
+ link_address_add_rrs(a);
+}
+
int link_update_rtnl(Link *l, sd_rtnl_message *m) {
const char *n = NULL;
int r;
@@ -129,6 +140,8 @@ int link_update_rtnl(Link *l, sd_rtnl_message *m) {
}
link_allocate_scopes(l);
+ link_add_rrs(l);
+
return 0;
}
@@ -183,6 +196,7 @@ int link_update_monitor(Link *l) {
link_update_dns_servers(l);
link_allocate_scopes(l);
+ link_add_rrs(l);
return 0;
}
@@ -210,7 +224,7 @@ bool link_relevant(Link *l, int family) {
return false;
}
-LinkAddress *link_find_address(Link *l, int family, union in_addr_union *in_addr) {
+LinkAddress *link_find_address(Link *l, int family, const union in_addr_union *in_addr) {
LinkAddress *a;
assert(l);
@@ -222,7 +236,7 @@ LinkAddress *link_find_address(Link *l, int family, union in_addr_union *in_addr
return NULL;
}
-DnsServer* link_find_dns_server(Link *l, int family, union in_addr_union *in_addr) {
+DnsServer* link_find_dns_server(Link *l, int family, const union in_addr_union *in_addr) {
DnsServer *s;
assert(l);
@@ -230,7 +244,6 @@ DnsServer* link_find_dns_server(Link *l, int family, union in_addr_union *in_add
LIST_FOREACH(servers, s, l->dns_servers)
if (s->family == family && in_addr_equal(family, &s->address, in_addr))
return s;
-
return NULL;
}
@@ -265,7 +278,7 @@ void link_next_dns_server(Link *l) {
l->current_dns_server = l->dns_servers;
}
-int link_address_new(Link *l, LinkAddress **ret, int family, union in_addr_union *in_addr) {
+int link_address_new(Link *l, LinkAddress **ret, int family, const union in_addr_union *in_addr) {
LinkAddress *a;
assert(l);
@@ -291,13 +304,130 @@ LinkAddress *link_address_free(LinkAddress *a) {
if (!a)
return NULL;
- if (a->link)
+ if (a->link) {
LIST_REMOVE(addresses, a->link->addresses, a);
+ 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);
+ else if (a->family == AF_INET6 && a->link->llmnr_ipv6_scope)
+ dns_zone_remove_rr(&a->link->llmnr_ipv6_scope->zone, a->llmnr_address_rr);
+
+ dns_resource_record_unref(a->llmnr_address_rr);
+ }
+
+ if (a->llmnr_ptr_rr) {
+ if (a->family == AF_INET && a->link->llmnr_ipv4_scope)
+ dns_zone_remove_rr(&a->link->llmnr_ipv4_scope->zone, a->llmnr_ptr_rr);
+ 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);
+
+ dns_resource_record_unref(a->llmnr_ptr_rr);
+ }
+ }
+
free(a);
return NULL;
}
+static void link_address_add_rrs(LinkAddress *a) {
+ int r;
+
+ assert(a);
+
+ if (a->family == AF_INET && a->link->llmnr_ipv4_scope) {
+
+ if (!a->link->manager->host_ipv4_key) {
+ a->link->manager->host_ipv4_key = dns_resource_key_new(DNS_CLASS_IN, DNS_TYPE_A, a->link->manager->hostname);
+ if (!a->link->manager->host_ipv4_key) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ }
+
+ if (!a->llmnr_address_rr) {
+ a->llmnr_address_rr = dns_resource_record_new(a->link->manager->host_ipv4_key);
+ if (!a->llmnr_address_rr) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ a->llmnr_address_rr->a.in_addr = a->in_addr.in;
+ a->llmnr_address_rr->ttl = DEFAULT_TTL;
+ }
+
+ if (!a->llmnr_ptr_rr) {
+ r = dns_resource_record_new_reverse(&a->llmnr_ptr_rr, a->family, &a->in_addr, a->link->manager->hostname);
+ if (r < 0)
+ goto fail;
+
+ a->llmnr_ptr_rr->ttl = DEFAULT_TTL;
+ }
+
+ if (link_address_relevant(a)) {
+ r = dns_zone_put(&a->link->llmnr_ipv4_scope->zone, a->llmnr_address_rr);
+ if (r < 0)
+ goto fail;
+
+ r = dns_zone_put(&a->link->llmnr_ipv4_scope->zone, a->llmnr_ptr_rr);
+ if (r < 0)
+ goto fail;
+ } else {
+ dns_zone_remove_rr(&a->link->llmnr_ipv4_scope->zone, a->llmnr_address_rr);
+ dns_zone_remove_rr(&a->link->llmnr_ipv4_scope->zone, a->llmnr_ptr_rr);
+ }
+ }
+
+ if (a->family == AF_INET6 && a->link->llmnr_ipv6_scope) {
+
+ if (!a->link->manager->host_ipv6_key) {
+ a->link->manager->host_ipv6_key = dns_resource_key_new(DNS_CLASS_IN, DNS_TYPE_AAAA, a->link->manager->hostname);
+ if (!a->link->manager->host_ipv6_key) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ }
+
+ if (!a->llmnr_address_rr) {
+ a->llmnr_address_rr = dns_resource_record_new(a->link->manager->host_ipv6_key);
+ if (!a->llmnr_address_rr) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ a->llmnr_address_rr->aaaa.in6_addr = a->in_addr.in6;
+ a->llmnr_address_rr->ttl = DEFAULT_TTL;
+ }
+
+ if (!a->llmnr_ptr_rr) {
+ r = dns_resource_record_new_reverse(&a->llmnr_ptr_rr, a->family, &a->in_addr, a->link->manager->hostname);
+ if (r < 0)
+ goto fail;
+
+ a->llmnr_ptr_rr->ttl = DEFAULT_TTL;
+ }
+
+ if (link_address_relevant(a)) {
+ r = dns_zone_put(&a->link->llmnr_ipv6_scope->zone, a->llmnr_address_rr);
+ if (r < 0)
+ goto fail;
+
+ r = dns_zone_put(&a->link->llmnr_ipv6_scope->zone, a->llmnr_ptr_rr);
+ if (r < 0)
+ goto fail;
+ } else {
+ dns_zone_remove_rr(&a->link->llmnr_ipv6_scope->zone, a->llmnr_address_rr);
+ dns_zone_remove_rr(&a->link->llmnr_ipv6_scope->zone, a->llmnr_ptr_rr);
+ }
+ }
+
+ return;
+
+fail:
+ log_debug("Failed to update address RRs: %s", strerror(-r));
+}
+
int link_address_update_rtnl(LinkAddress *a, sd_rtnl_message *m) {
int r;
assert(a);
@@ -310,6 +440,8 @@ int link_address_update_rtnl(LinkAddress *a, sd_rtnl_message *m) {
sd_rtnl_message_addr_get_scope(m, &a->scope);
link_allocate_scopes(a->link);
+ link_add_rrs(a->link);
+
return 0;
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-20 09:41:45 +0000