#include "sd-network.h"
#include "strv.h"
+#include "missing.h"
#include "resolved-link.h"
-/* RFC 4795 Section 2.8. suggests a TTL of 30s by default */
-#define LLMNR_DEFAULT_TTL (30)
-
-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;
return -ENOMEM;
l->ifindex = ifindex;
+ l->llmnr_support = SUPPORT_YES;
r = hashmap_put(m->links, INT_TO_PTR(ifindex), l);
if (r < 0)
} else
l->unicast_scope = dns_scope_free(l->unicast_scope);
- if (link_relevant(l, AF_INET) && l->manager->use_llmnr) {
+ if (link_relevant(l, AF_INET) && l->llmnr_support != SUPPORT_NO && l->manager->llmnr_support != SUPPORT_NO) {
if (!l->llmnr_ipv4_scope) {
r = dns_scope_new(l->manager, &l->llmnr_ipv4_scope, l, DNS_PROTOCOL_LLMNR, AF_INET);
if (r < 0)
} else
l->llmnr_ipv4_scope = dns_scope_free(l->llmnr_ipv4_scope);
- if (link_relevant(l, AF_INET6) && l->manager->use_llmnr) {
+ if (link_relevant(l, AF_INET6) && l->llmnr_support != SUPPORT_NO && l->manager->llmnr_support != SUPPORT_NO) {
if (!l->llmnr_ipv6_scope) {
r = dns_scope_new(l->manager, &l->llmnr_ipv6_scope, l, DNS_PROTOCOL_LLMNR, AF_INET6);
if (r < 0)
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) {
sd_rtnl_message_read_u32(m, IFLA_MTU, &l->mtu);
if (sd_rtnl_message_read_string(m, IFLA_IFNAME, &n) >= 0) {
- strncpy(l->name, n, sizeof(l->name));
+ strncpy(l->name, n, sizeof(l->name)-1);
char_array_0(l->name);
}
link_allocate_scopes(l);
- link_add_rrs(l);
+ link_add_rrs(l, false);
return 0;
}
assert(l);
- LIST_FOREACH(servers, s, l->dns_servers)
- s->marked = true;
-
- r = sd_network_get_dns(l->ifindex, &nameservers);
+ r = sd_network_get_link_dns(l->ifindex, &nameservers);
if (r < 0)
goto clear;
+ LIST_FOREACH(servers, s, l->dns_servers)
+ s->marked = true;
+
STRV_FOREACH(nameserver, nameservers) {
union in_addr_union a;
int family;
if (s)
s->marked = false;
else {
- r = dns_server_new(l->manager, NULL, l, family, &a);
+ r = dns_server_new(l->manager, NULL, DNS_SERVER_LINK, l, family, &a);
if (r < 0)
goto clear;
}
return r;
}
+static int link_update_llmnr_support(Link *l) {
+ _cleanup_free_ char *b = NULL;
+ int r;
+
+ assert(l);
+
+ r = sd_network_get_link_llmnr(l->ifindex, &b);
+ if (r < 0)
+ goto clear;
+
+ r = parse_boolean(b);
+ if (r < 0) {
+ if (streq(b, "resolve"))
+ l->llmnr_support = SUPPORT_RESOLVE;
+ else
+ goto clear;
+
+ } else if (r > 0)
+ l->llmnr_support = SUPPORT_YES;
+ else
+ l->llmnr_support = SUPPORT_NO;
+
+ return 0;
+
+clear:
+ l->llmnr_support = SUPPORT_YES;
+ return r;
+}
+
int link_update_monitor(Link *l) {
assert(l);
link_update_dns_servers(l);
+ link_update_llmnr_support(l);
link_allocate_scopes(l);
- link_add_rrs(l);
+ link_add_rrs(l, false);
return 0;
}
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)
+ if (l->flags & (IFF_LOOPBACK|IFF_POINTOPOINT|IFF_DORMANT))
+ return false;
+
+ 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);
return NULL;
}
+DnsServer* link_set_dns_server(Link *l, DnsServer *s) {
+ assert(l);
+
+ if (l->current_dns_server == s)
+ return s;
+
+ if (s) {
+ _cleanup_free_ char *ip = NULL;
+
+ in_addr_to_string(s->family, &s->address, &ip);
+ log_info("Switching to DNS server %s for interface %s.", strna(ip), l->name);
+ }
+
+ l->current_dns_server = s;
+
+ if (l->unicast_scope)
+ dns_cache_flush(&l->unicast_scope->cache);
+
+ return s;
+}
+
DnsServer *link_get_dns_server(Link *l) {
assert(l);
if (!l->current_dns_server)
- l->current_dns_server = l->dns_servers;
+ link_set_dns_server(l, l->dns_servers);
return l->current_dns_server;
}
void link_next_dns_server(Link *l) {
assert(l);
- /* Switch to the next DNS server */
-
- if (!l->current_dns_server) {
- l->current_dns_server = l->dns_servers;
- if (l->current_dns_server)
- return;
- }
-
if (!l->current_dns_server)
return;
if (l->current_dns_server->servers_next) {
- l->current_dns_server = l->current_dns_server->servers_next;
+ link_set_dns_server(l, l->current_dns_server->servers_next);
return;
}
- l->current_dns_server = l->dns_servers;
+ link_set_dns_server(l, l->dns_servers);
}
int link_address_new(Link *l, LinkAddress **ret, int family, const union in_addr_union *in_addr) {
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) {
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 (!force_remove &&
+ link_address_relevant(a) &&
+ a->link->llmnr_ipv4_scope &&
+ a->link->llmnr_support == SUPPORT_YES &&
+ a->link->manager->llmnr_support == SUPPORT_YES) {
- 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;
+ 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 to 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 to 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 (!force_remove &&
+ link_address_relevant(a) &&
+ a->link->llmnr_ipv6_scope &&
+ a->link->llmnr_support == SUPPORT_YES &&
+ a->link->manager->llmnr_support == SUPPORT_YES) {
- 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;
+ 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);
+ }
}
}
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;
}
bool link_address_relevant(LinkAddress *a) {
assert(a);
- if (a->flags & IFA_F_DEPRECATED)
+ if (a->flags & (IFA_F_DEPRECATED|IFA_F_TENTATIVE))
return false;
if (IN_SET(a->scope, RT_SCOPE_HOST, RT_SCOPE_NOWHERE))
~ianmdlvl / elogind.git / blobdiff