#include <net/if.h>
#include "sd-network.h"
-#include "dhcp-lease-internal.h"
#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;
hashmap_remove(l->manager->links, INT_TO_PTR(l->ifindex));
dns_scope_free(l->unicast_scope);
- dns_scope_free(l->mdns_ipv4_scope);
- dns_scope_free(l->mdns_ipv6_scope);
+ dns_scope_free(l->llmnr_ipv4_scope);
+ dns_scope_free(l->llmnr_ipv6_scope);
- while (l->dhcp_dns_servers)
- dns_server_free(l->dhcp_dns_servers);
-
- while (l->link_dns_servers)
- dns_server_free(l->link_dns_servers);
+ while (l->dns_servers)
+ dns_server_free(l->dns_servers);
free(l);
return NULL;
- }
+}
-int link_update_rtnl(Link *l, sd_rtnl_message *m) {
+static void link_allocate_scopes(Link *l) {
int r;
assert(l);
- assert(m);
- r = sd_rtnl_message_link_get_flags(m, &l->flags);
- if (r < 0)
- return r;
+ if (l->dns_servers) {
+ if (!l->unicast_scope) {
+ r = dns_scope_new(l->manager, &l->unicast_scope, l, DNS_PROTOCOL_DNS, AF_UNSPEC);
+ if (r < 0)
+ log_warning("Failed to allocate DNS scope: %s", strerror(-r));
+ }
+ } else
+ l->unicast_scope = dns_scope_free(l->unicast_scope);
- return 0;
-}
+ 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)
+ log_warning("Failed to allocate LLMNR IPv4 scope: %s", strerror(-r));
+ }
+ } else
+ l->llmnr_ipv4_scope = dns_scope_free(l->llmnr_ipv4_scope);
-static int update_dhcp_dns_servers(Link *l) {
- _cleanup_dhcp_lease_unref_ sd_dhcp_lease *lease = NULL;
- _cleanup_free_ struct in_addr *nameservers = NULL;
- DnsServer *s, *nx;
- unsigned i;
- size_t n;
- int r;
+ 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)
+ log_warning("Failed to allocate LLMNR IPv6 scope: %s", strerror(-r));
+ }
+ } else
+ l->llmnr_ipv6_scope = dns_scope_free(l->llmnr_ipv6_scope);
+}
- assert(l);
+static void link_add_rrs(Link *l) {
+ LinkAddress *a;
- r = sd_network_dhcp_use_dns(l->ifindex);
- if (r <= 0)
- goto clear;
+ LIST_FOREACH(addresses, a, l->addresses)
+ link_address_add_rrs(a);
+}
- r = sd_network_get_dhcp_lease(l->ifindex, &lease);
- if (r < 0)
- goto clear;
+int link_update_rtnl(Link *l, sd_rtnl_message *m) {
+ const char *n = NULL;
+ int r;
- LIST_FOREACH(servers, s, l->dhcp_dns_servers)
- s->marked = true;
+ assert(l);
+ assert(m);
- r = sd_dhcp_lease_get_dns(lease, &nameservers, &n);
+ r = sd_rtnl_message_link_get_flags(m, &l->flags);
if (r < 0)
- goto clear;
+ return r;
- for (i = 0; i < n; i++) {
- union in_addr_union a = { .in = nameservers[i] };
+ sd_rtnl_message_read_u32(m, IFLA_MTU, &l->mtu);
- s = link_find_dns_server(l, DNS_SERVER_DHCP, AF_INET, &a);
- if (s)
- s->marked = false;
- else {
- r = dns_server_new(l->manager, NULL, DNS_SERVER_DHCP, l, AF_INET, &a);
- if (r < 0)
- goto clear;
- }
+ if (sd_rtnl_message_read_string(m, IFLA_IFNAME, &n) >= 0) {
+ strncpy(l->name, n, sizeof(l->name));
+ char_array_0(l->name);
}
- LIST_FOREACH_SAFE(servers, s, nx, l->dhcp_dns_servers)
- if (s->marked)
- dns_server_free(s);
+ link_allocate_scopes(l);
+ link_add_rrs(l);
return 0;
-
-clear:
- while (l->dhcp_dns_servers)
- dns_server_free(l->dhcp_dns_servers);
-
- return r;
}
-static int update_link_dns_servers(Link *l) {
- _cleanup_free_ struct in_addr *nameservers = NULL;
- _cleanup_free_ struct in6_addr *nameservers6 = NULL;
+static int link_update_dns_servers(Link *l) {
+ _cleanup_strv_free_ char **nameservers = NULL;
+ char **nameserver;
DnsServer *s, *nx;
- unsigned i;
- size_t n;
int r;
assert(l);
- LIST_FOREACH(servers, s, l->link_dns_servers)
+ LIST_FOREACH(servers, s, l->dns_servers)
s->marked = true;
- r = sd_network_get_dns(l->ifindex, &nameservers, &n);
+ r = sd_network_get_dns(l->ifindex, &nameservers);
if (r < 0)
goto clear;
- for (i = 0; i < n; i++) {
- union in_addr_union a = { .in = nameservers[i] };
+ STRV_FOREACH(nameserver, nameservers) {
+ union in_addr_union a;
+ int family;
- s = link_find_dns_server(l, DNS_SERVER_LINK, AF_INET, &a);
- if (s)
- s->marked = false;
- else {
- r = dns_server_new(l->manager, NULL, DNS_SERVER_LINK, l, AF_INET, &a);
- if (r < 0)
- goto clear;
- }
- }
+ r = in_addr_from_string_auto(*nameserver, &family, &a);
+ if (r < 0)
+ goto clear;
- r = sd_network_get_dns6(l->ifindex, &nameservers6, &n);
- if (r < 0)
- goto clear;
-
- for (i = 0; i < n; i++) {
- union in_addr_union a = { .in6 = nameservers6[i] };
-
- s = link_find_dns_server(l, DNS_SERVER_LINK, AF_INET6, &a);
+ s = link_find_dns_server(l, family, &a);
if (s)
s->marked = false;
else {
- r = dns_server_new(l->manager, NULL, DNS_SERVER_LINK, l, AF_INET6, &a);
+ r = dns_server_new(l->manager, NULL, l, family, &a);
if (r < 0)
goto clear;
}
}
- LIST_FOREACH_SAFE(servers, s, nx, l->link_dns_servers)
+ LIST_FOREACH_SAFE(servers, s, nx, l->dns_servers)
if (s->marked)
dns_server_free(s);
return 0;
clear:
- while (l->link_dns_servers)
- dns_server_free(l->link_dns_servers);
+ while (l->dns_servers)
+ dns_server_free(l->dns_servers);
return r;
}
int link_update_monitor(Link *l) {
assert(l);
- free(l->operational_state);
- l->operational_state = NULL;
-
- sd_network_get_link_operational_state(l->ifindex, &l->operational_state);
-
- update_dhcp_dns_servers(l);
- update_link_dns_servers(l);
+ link_update_dns_servers(l);
+ link_allocate_scopes(l);
+ link_add_rrs(l);
return 0;
}
-bool link_relevant(Link *l) {
+bool link_relevant(Link *l, int family) {
+ _cleanup_free_ char *state = NULL;
LinkAddress *a;
assert(l);
if (l->flags & IFF_LOOPBACK)
return false;
- if (l->operational_state && !STR_IN_SET(l->operational_state, "unknown", "degraded", "routable"))
+ sd_network_get_link_operational_state(l->ifindex, &state);
+ if (state && !STR_IN_SET(state, "unknown", "degraded", "routable"))
return false;
LIST_FOREACH(addresses, a, l->addresses)
- if (link_address_relevant(a))
+ if (a->family == family && link_address_relevant(a))
return true;
return false;
}
-LinkAddress *link_find_address(Link *l, unsigned char 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);
- LIST_FOREACH(addresses, a, l->addresses) {
-
- if (a->family == family &&
- in_addr_equal(family, &a->in_addr, in_addr))
+ LIST_FOREACH(addresses, a, l->addresses)
+ if (a->family == family && in_addr_equal(family, &a->in_addr, in_addr))
return a;
- }
return NULL;
}
-DnsServer* link_find_dns_server(Link *l, DnsServerSource source, unsigned char family, union in_addr_union *in_addr) {
- DnsServer *first, *s;
+DnsServer* link_find_dns_server(Link *l, int family, const union in_addr_union *in_addr) {
+ DnsServer *s;
assert(l);
- first = source == DNS_SERVER_DHCP ? l->dhcp_dns_servers : l->link_dns_servers;
-
- LIST_FOREACH(servers, s, first) {
-
- if (s->family == family &&
- in_addr_equal(family, &s->address, in_addr))
+ LIST_FOREACH(servers, s, l->dns_servers)
+ if (s->family == family && in_addr_equal(family, &s->address, in_addr))
return s;
- }
-
return NULL;
}
assert(l);
if (!l->current_dns_server)
- l->current_dns_server = l->link_dns_servers;
- if (!l->current_dns_server)
- l->current_dns_server = l->dhcp_dns_servers;
+ l->current_dns_server = l->dns_servers;
return l->current_dns_server;
}
/* Switch to the next DNS server */
if (!l->current_dns_server) {
- l->current_dns_server = l->link_dns_servers;
- if (l->current_dns_server)
- return;
- }
-
- if (!l->current_dns_server) {
- l->current_dns_server = l->dhcp_dns_servers;
+ l->current_dns_server = l->dns_servers;
if (l->current_dns_server)
return;
}
return;
}
- if (l->current_dns_server->source == DNS_SERVER_LINK)
- l->current_dns_server = l->dhcp_dns_servers;
- else {
- assert(l->current_dns_server->source == DNS_SERVER_DHCP);
- l->current_dns_server = l->link_dns_servers;
- }
+ l->current_dns_server = l->dns_servers;
}
-int link_address_new(Link *l, LinkAddress **ret, unsigned char 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);
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);
if (r < 0)
return r;
- r = sd_rtnl_message_addr_get_scope(m, &a->scope);
- if (r < 0)
- return r;
+ sd_rtnl_message_addr_get_scope(m, &a->scope);
+
+ link_allocate_scopes(a->link);
+ link_add_rrs(a->link);
return 0;
}
~ianmdlvl / elogind.git / blobdiff