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Diffstat (limited to 'src/resolve/resolved-link.c')
-rw-r--r--src/resolve/resolved-link.c163
1 files changed, 91 insertions, 72 deletions
diff --git a/src/resolve/resolved-link.c b/src/resolve/resolved-link.c
index a4c23bab06..5355eab042 100644
--- a/src/resolve/resolved-link.c
+++ b/src/resolve/resolved-link.c
@@ -23,10 +23,9 @@
#include "sd-network.h"
#include "strv.h"
+#include "missing.h"
#include "resolved-link.h"
-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;
@@ -93,7 +92,7 @@ static void link_allocate_scopes(Link *l) {
} else
l->unicast_scope = dns_scope_free(l->unicast_scope);
- if (link_relevant(l, AF_INET) && (l->flags & IFF_MULTICAST) && l->manager->use_llmnr) {
+ if (link_relevant(l, AF_INET) && l->manager->use_llmnr) {
if (!l->llmnr_ipv4_scope) {
r = dns_scope_new(l->manager, &l->llmnr_ipv4_scope, l, DNS_PROTOCOL_LLMNR, AF_INET);
if (r < 0)
@@ -102,7 +101,7 @@ static void link_allocate_scopes(Link *l) {
} else
l->llmnr_ipv4_scope = dns_scope_free(l->llmnr_ipv4_scope);
- if (link_relevant(l, AF_INET6) && (l->flags & IFF_MULTICAST) && l->manager->use_llmnr) {
+ if (link_relevant(l, AF_INET6) && l->manager->use_llmnr) {
if (!l->llmnr_ipv6_scope) {
r = dns_scope_new(l->manager, &l->llmnr_ipv6_scope, l, DNS_PROTOCOL_LLMNR, AF_INET6);
if (r < 0)
@@ -112,11 +111,11 @@ 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) {
+void link_add_rrs(Link *l, bool force_remove) {
LinkAddress *a;
LIST_FOREACH(addresses, a, l->addresses)
- link_address_add_rrs(a);
+ link_address_add_rrs(a, force_remove);
}
int link_update_rtnl(Link *l, sd_rtnl_message *m) {
@@ -138,7 +137,7 @@ int link_update_rtnl(Link *l, sd_rtnl_message *m) {
}
link_allocate_scopes(l);
- link_add_rrs(l);
+ link_add_rrs(l, false);
return 0;
}
@@ -194,7 +193,7 @@ int link_update_monitor(Link *l) {
link_update_dns_servers(l);
link_allocate_scopes(l);
- link_add_rrs(l);
+ link_add_rrs(l, false);
return 0;
}
@@ -205,10 +204,14 @@ bool link_relevant(Link *l, int family) {
assert(l);
- /* A link is relevant if it isn't a loopback device and has at
- * least one relevant IP address */
+ /* A link is relevant if it isn't a loopback or pointopoint
+ * device, has a link beat, can do multicast and has at least
+ * one relevant IP address */
+
+ if (l->flags & (IFF_LOOPBACK|IFF_POINTOPOINT|IFF_DORMANT))
+ return false;
- if (l->flags & IFF_LOOPBACK)
+ if ((l->flags & (IFF_UP|IFF_LOWER_UP|IFF_MULTICAST)) != (IFF_UP|IFF_LOWER_UP|IFF_MULTICAST))
return false;
sd_network_get_link_operational_state(l->ifindex, &state);
@@ -306,13 +309,10 @@ LinkAddress *link_address_free(LinkAddress *a) {
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) {
@@ -320,103 +320,122 @@ LinkAddress *link_address_free(LinkAddress *a) {
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);
}
}
+ dns_resource_record_unref(a->llmnr_address_rr);
+ dns_resource_record_unref(a->llmnr_ptr_rr);
+
free(a);
return NULL;
}
-static void link_address_add_rrs(LinkAddress *a) {
+void link_address_add_rrs(LinkAddress *a, bool force_remove) {
int r;
assert(a);
- if (a->family == AF_INET && a->link->llmnr_ipv4_scope) {
+ if (a->family == AF_INET) {
- 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 (!force_remove && link_address_relevant(a) && a->link->llmnr_ipv4_scope) {
if (!a->link->manager->host_ipv4_key) {
- r = -ENOMEM;
- goto fail;
+ 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 = 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 = LLMNR_DEFAULT_TTL;
}
- a->llmnr_address_rr->a.in_addr = a->in_addr.in;
- a->llmnr_address_rr->ttl = LLMNR_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;
+ 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 = LLMNR_DEFAULT_TTL;
- }
+ a->llmnr_ptr_rr->ttl = LLMNR_DEFAULT_TTL;
+ }
- if (link_address_relevant(a)) {
- r = dns_zone_put(&a->link->llmnr_ipv4_scope->zone, a->llmnr_address_rr);
+ r = dns_zone_put(&a->link->llmnr_ipv4_scope->zone, a->link->llmnr_ipv4_scope, a->llmnr_address_rr, true);
if (r < 0)
- goto fail;
+ log_warning("Failed tp add A record to LLMNR zone: %s", strerror(-r));
- r = dns_zone_put(&a->link->llmnr_ipv4_scope->zone, a->llmnr_ptr_rr);
+ r = dns_zone_put(&a->link->llmnr_ipv4_scope->zone, a->link->llmnr_ipv4_scope, a->llmnr_ptr_rr, false);
if (r < 0)
- goto fail;
+ log_warning("Failed tp add IPv6 PTR record to LLMNR zone: %s", strerror(-r));
} 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->llmnr_address_rr) {
+ if (a->link->llmnr_ipv4_scope)
+ dns_zone_remove_rr(&a->link->llmnr_ipv4_scope->zone, a->llmnr_address_rr);
+ a->llmnr_address_rr = dns_resource_record_unref(a->llmnr_address_rr);
+ }
+
+ if (a->llmnr_ptr_rr) {
+ if (a->link->llmnr_ipv4_scope)
+ dns_zone_remove_rr(&a->link->llmnr_ipv4_scope->zone, a->llmnr_ptr_rr);
+ a->llmnr_ptr_rr = dns_resource_record_unref(a->llmnr_ptr_rr);
+ }
}
}
- if (a->family == AF_INET6 && a->link->llmnr_ipv6_scope) {
+ if (a->family == AF_INET6) {
- 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 (!force_remove && link_address_relevant(a) && a->link->llmnr_ipv6_scope) {
if (!a->link->manager->host_ipv6_key) {
- r = -ENOMEM;
- goto fail;
+ 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 = 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 = LLMNR_DEFAULT_TTL;
}
- a->llmnr_address_rr->aaaa.in6_addr = a->in_addr.in6;
- a->llmnr_address_rr->ttl = LLMNR_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;
+ 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 = LLMNR_DEFAULT_TTL;
- }
+ a->llmnr_ptr_rr->ttl = LLMNR_DEFAULT_TTL;
+ }
- if (link_address_relevant(a)) {
- r = dns_zone_put(&a->link->llmnr_ipv6_scope->zone, a->llmnr_address_rr);
+ r = dns_zone_put(&a->link->llmnr_ipv6_scope->zone, a->link->llmnr_ipv6_scope, a->llmnr_address_rr, true);
if (r < 0)
- goto fail;
+ log_warning("Failed to add AAAA record to LLMNR zone: %s", strerror(-r));
- r = dns_zone_put(&a->link->llmnr_ipv6_scope->zone, a->llmnr_ptr_rr);
+ r = dns_zone_put(&a->link->llmnr_ipv6_scope->zone, a->link->llmnr_ipv6_scope, a->llmnr_ptr_rr, false);
if (r < 0)
- goto fail;
+ log_warning("Failed to add IPv6 PTR record to LLMNR zone: %s", strerror(-r));
} 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);
+ if (a->llmnr_address_rr) {
+ if (a->link->llmnr_ipv6_scope)
+ dns_zone_remove_rr(&a->link->llmnr_ipv6_scope->zone, a->llmnr_address_rr);
+ a->llmnr_address_rr = dns_resource_record_unref(a->llmnr_address_rr);
+ }
+
+ if (a->llmnr_ptr_rr) {
+ if (a->link->llmnr_ipv6_scope)
+ dns_zone_remove_rr(&a->link->llmnr_ipv6_scope->zone, a->llmnr_ptr_rr);
+ a->llmnr_ptr_rr = dns_resource_record_unref(a->llmnr_ptr_rr);
+ }
}
}
@@ -438,7 +457,7 @@ 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);
+ link_add_rrs(a->link, false);
return 0;
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-11 09:13:52 +0000