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-rw-r--r--src/resolve/resolved-link-bus.c700
1 files changed, 700 insertions, 0 deletions
diff --git a/src/resolve/resolved-link-bus.c b/src/resolve/resolved-link-bus.c
new file mode 100644
index 0000000..96093ff
--- /dev/null
+++ b/src/resolve/resolved-link-bus.c
@@ -0,0 +1,700 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include "alloc-util.h"
+#include "bus-common-errors.h"
+#include "bus-util.h"
+#include "parse-util.h"
+#include "resolve-util.h"
+#include "resolved-bus.h"
+#include "resolved-link-bus.h"
+#include "resolved-resolv-conf.h"
+#include "strv.h"
+
+static BUS_DEFINE_PROPERTY_GET(property_get_dnssec_supported, "b", Link, link_dnssec_supported);
+static BUS_DEFINE_PROPERTY_GET2(property_get_dnssec_mode, "s", Link, link_get_dnssec_mode, dnssec_mode_to_string);
+
+static int property_get_dns_over_tls_mode(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ Link *l = userdata;
+
+ assert(reply);
+ assert(l);
+
+ return sd_bus_message_append(reply, "s", dns_over_tls_mode_to_string(link_get_dns_over_tls_mode(l)));
+}
+
+static int property_get_dns(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ Link *l = userdata;
+ DnsServer *s;
+ int r;
+
+ assert(reply);
+ assert(l);
+
+ r = sd_bus_message_open_container(reply, 'a', "(iay)");
+ if (r < 0)
+ return r;
+
+ LIST_FOREACH(servers, s, l->dns_servers) {
+ r = bus_dns_server_append(reply, s, false);
+ if (r < 0)
+ return r;
+ }
+
+ return sd_bus_message_close_container(reply);
+}
+
+static int property_get_current_dns_server(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ DnsServer *s;
+
+ assert(reply);
+ assert(userdata);
+
+ s = *(DnsServer **) userdata;
+
+ return bus_dns_server_append(reply, s, false);
+}
+
+static int property_get_domains(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ Link *l = userdata;
+ DnsSearchDomain *d;
+ int r;
+
+ assert(reply);
+ assert(l);
+
+ r = sd_bus_message_open_container(reply, 'a', "(sb)");
+ if (r < 0)
+ return r;
+
+ LIST_FOREACH(domains, d, l->search_domains) {
+ r = sd_bus_message_append(reply, "(sb)", d->name, d->route_only);
+ if (r < 0)
+ return r;
+ }
+
+ return sd_bus_message_close_container(reply);
+}
+
+static int property_get_default_route(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ Link *l = userdata;
+
+ assert(reply);
+ assert(l);
+
+ /* Return what is configured, if there's something configured */
+ if (l->default_route >= 0)
+ return sd_bus_message_append(reply, "b", l->default_route);
+
+ /* Otherwise report what is in effect */
+ if (l->unicast_scope)
+ return sd_bus_message_append(reply, "b", dns_scope_is_default_route(l->unicast_scope));
+
+ return sd_bus_message_append(reply, "b", false);
+}
+
+static int property_get_scopes_mask(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ Link *l = userdata;
+ uint64_t mask;
+
+ assert(reply);
+ assert(l);
+
+ mask = (l->unicast_scope ? SD_RESOLVED_DNS : 0) |
+ (l->llmnr_ipv4_scope ? SD_RESOLVED_LLMNR_IPV4 : 0) |
+ (l->llmnr_ipv6_scope ? SD_RESOLVED_LLMNR_IPV6 : 0) |
+ (l->mdns_ipv4_scope ? SD_RESOLVED_MDNS_IPV4 : 0) |
+ (l->mdns_ipv6_scope ? SD_RESOLVED_MDNS_IPV6 : 0);
+
+ return sd_bus_message_append(reply, "t", mask);
+}
+
+static int property_get_ntas(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ Link *l = userdata;
+ const char *name;
+ Iterator i;
+ int r;
+
+ assert(reply);
+ assert(l);
+
+ r = sd_bus_message_open_container(reply, 'a', "s");
+ if (r < 0)
+ return r;
+
+ SET_FOREACH(name, l->dnssec_negative_trust_anchors, i) {
+ r = sd_bus_message_append(reply, "s", name);
+ if (r < 0)
+ return r;
+ }
+
+ return sd_bus_message_close_container(reply);
+}
+
+static int verify_unmanaged_link(Link *l, sd_bus_error *error) {
+ assert(l);
+
+ if (l->flags & IFF_LOOPBACK)
+ return sd_bus_error_setf(error, BUS_ERROR_LINK_BUSY, "Link %s is loopback device.", l->name);
+ if (l->is_managed)
+ return sd_bus_error_setf(error, BUS_ERROR_LINK_BUSY, "Link %s is managed.", l->name);
+
+ return 0;
+}
+
+int bus_link_method_set_dns_servers(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ _cleanup_free_ struct in_addr_data *dns = NULL;
+ size_t allocated = 0, n = 0;
+ Link *l = userdata;
+ unsigned i;
+ int r;
+
+ assert(message);
+ assert(l);
+
+ r = verify_unmanaged_link(l, error);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_enter_container(message, 'a', "(iay)");
+ if (r < 0)
+ return r;
+
+ for (;;) {
+ int family;
+ size_t sz;
+ const void *d;
+
+ assert_cc(sizeof(int) == sizeof(int32_t));
+
+ r = sd_bus_message_enter_container(message, 'r', "iay");
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ r = sd_bus_message_read(message, "i", &family);
+ if (r < 0)
+ return r;
+
+ if (!IN_SET(family, AF_INET, AF_INET6))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family);
+
+ r = sd_bus_message_read_array(message, 'y', &d, &sz);
+ if (r < 0)
+ return r;
+ if (sz != FAMILY_ADDRESS_SIZE(family))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid address size");
+
+ if (!dns_server_address_valid(family, d))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid DNS server address");
+
+ r = sd_bus_message_exit_container(message);
+ if (r < 0)
+ return r;
+
+ if (!GREEDY_REALLOC(dns, allocated, n+1))
+ return -ENOMEM;
+
+ dns[n].family = family;
+ memcpy(&dns[n].address, d, sz);
+ n++;
+ }
+
+ r = sd_bus_message_exit_container(message);
+ if (r < 0)
+ return r;
+
+ dns_server_mark_all(l->dns_servers);
+
+ for (i = 0; i < n; i++) {
+ DnsServer *s;
+
+ s = dns_server_find(l->dns_servers, dns[i].family, &dns[i].address, 0);
+ if (s)
+ dns_server_move_back_and_unmark(s);
+ else {
+ r = dns_server_new(l->manager, NULL, DNS_SERVER_LINK, l, dns[i].family, &dns[i].address, 0);
+ if (r < 0)
+ goto clear;
+ }
+
+ }
+
+ dns_server_unlink_marked(l->dns_servers);
+ link_allocate_scopes(l);
+
+ (void) link_save_user(l);
+ (void) manager_write_resolv_conf(l->manager);
+
+ return sd_bus_reply_method_return(message, NULL);
+
+clear:
+ dns_server_unlink_all(l->dns_servers);
+ return r;
+}
+
+int bus_link_method_set_domains(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ Link *l = userdata;
+ int r;
+
+ assert(message);
+ assert(l);
+
+ r = verify_unmanaged_link(l, error);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_enter_container(message, 'a', "(sb)");
+ if (r < 0)
+ return r;
+
+ for (;;) {
+ const char *name;
+ int route_only;
+
+ r = sd_bus_message_read(message, "(sb)", &name, &route_only);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ r = dns_name_is_valid(name);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid search domain %s", name);
+ if (!route_only && dns_name_is_root(name))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Root domain is not suitable as search domain");
+ }
+
+ dns_search_domain_mark_all(l->search_domains);
+
+ r = sd_bus_message_rewind(message, false);
+ if (r < 0)
+ return r;
+
+ for (;;) {
+ DnsSearchDomain *d;
+ const char *name;
+ int route_only;
+
+ r = sd_bus_message_read(message, "(sb)", &name, &route_only);
+ if (r < 0)
+ goto clear;
+ if (r == 0)
+ break;
+
+ r = dns_search_domain_find(l->search_domains, name, &d);
+ if (r < 0)
+ goto clear;
+
+ if (r > 0)
+ dns_search_domain_move_back_and_unmark(d);
+ else {
+ r = dns_search_domain_new(l->manager, &d, DNS_SEARCH_DOMAIN_LINK, l, name);
+ if (r < 0)
+ goto clear;
+ }
+
+ d->route_only = route_only;
+ }
+
+ r = sd_bus_message_exit_container(message);
+ if (r < 0)
+ goto clear;
+
+ dns_search_domain_unlink_marked(l->search_domains);
+
+ (void) link_save_user(l);
+ (void) manager_write_resolv_conf(l->manager);
+
+ return sd_bus_reply_method_return(message, NULL);
+
+clear:
+ dns_search_domain_unlink_all(l->search_domains);
+ return r;
+}
+
+int bus_link_method_set_default_route(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ Link *l = userdata;
+ int r, b;
+
+ assert(message);
+ assert(l);
+
+ r = verify_unmanaged_link(l, error);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(message, "b", &b);
+ if (r < 0)
+ return r;
+
+ if (l->default_route != b) {
+ l->default_route = b;
+
+ (void) link_save_user(l);
+ (void) manager_write_resolv_conf(l->manager);
+ }
+
+ return sd_bus_reply_method_return(message, NULL);
+}
+
+int bus_link_method_set_llmnr(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ Link *l = userdata;
+ ResolveSupport mode;
+ const char *llmnr;
+ int r;
+
+ assert(message);
+ assert(l);
+
+ r = verify_unmanaged_link(l, error);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(message, "s", &llmnr);
+ if (r < 0)
+ return r;
+
+ if (isempty(llmnr))
+ mode = RESOLVE_SUPPORT_YES;
+ else {
+ mode = resolve_support_from_string(llmnr);
+ if (mode < 0)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid LLMNR setting: %s", llmnr);
+ }
+
+ l->llmnr_support = mode;
+ link_allocate_scopes(l);
+ link_add_rrs(l, false);
+
+ (void) link_save_user(l);
+
+ return sd_bus_reply_method_return(message, NULL);
+}
+
+int bus_link_method_set_mdns(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ Link *l = userdata;
+ ResolveSupport mode;
+ const char *mdns;
+ int r;
+
+ assert(message);
+ assert(l);
+
+ r = verify_unmanaged_link(l, error);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(message, "s", &mdns);
+ if (r < 0)
+ return r;
+
+ if (isempty(mdns))
+ mode = RESOLVE_SUPPORT_NO;
+ else {
+ mode = resolve_support_from_string(mdns);
+ if (mode < 0)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid MulticastDNS setting: %s", mdns);
+ }
+
+ l->mdns_support = mode;
+ link_allocate_scopes(l);
+ link_add_rrs(l, false);
+
+ (void) link_save_user(l);
+
+ return sd_bus_reply_method_return(message, NULL);
+}
+
+int bus_link_method_set_dns_over_tls(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ Link *l = userdata;
+ const char *dns_over_tls;
+ DnsOverTlsMode mode;
+ int r;
+
+ assert(message);
+ assert(l);
+
+ r = verify_unmanaged_link(l, error);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(message, "s", &dns_over_tls);
+ if (r < 0)
+ return r;
+
+ if (isempty(dns_over_tls))
+ mode = _DNS_OVER_TLS_MODE_INVALID;
+ else {
+ mode = dns_over_tls_mode_from_string(dns_over_tls);
+ if (mode < 0)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid DNSOverTLS setting: %s", dns_over_tls);
+ }
+
+ link_set_dns_over_tls_mode(l, mode);
+
+ (void) link_save_user(l);
+
+ return sd_bus_reply_method_return(message, NULL);
+}
+
+int bus_link_method_set_dnssec(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ Link *l = userdata;
+ const char *dnssec;
+ DnssecMode mode;
+ int r;
+
+ assert(message);
+ assert(l);
+
+ r = verify_unmanaged_link(l, error);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read(message, "s", &dnssec);
+ if (r < 0)
+ return r;
+
+ if (isempty(dnssec))
+ mode = _DNSSEC_MODE_INVALID;
+ else {
+ mode = dnssec_mode_from_string(dnssec);
+ if (mode < 0)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid DNSSEC setting: %s", dnssec);
+ }
+
+ link_set_dnssec_mode(l, mode);
+
+ (void) link_save_user(l);
+
+ return sd_bus_reply_method_return(message, NULL);
+}
+
+int bus_link_method_set_dnssec_negative_trust_anchors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ _cleanup_set_free_free_ Set *ns = NULL;
+ _cleanup_strv_free_ char **ntas = NULL;
+ Link *l = userdata;
+ int r;
+ char **i;
+
+ assert(message);
+ assert(l);
+
+ r = verify_unmanaged_link(l, error);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read_strv(message, &ntas);
+ if (r < 0)
+ return r;
+
+ STRV_FOREACH(i, ntas) {
+ r = dns_name_is_valid(*i);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid negative trust anchor domain: %s", *i);
+ }
+
+ ns = set_new(&dns_name_hash_ops);
+ if (!ns)
+ return -ENOMEM;
+
+ STRV_FOREACH(i, ntas) {
+ r = set_put_strdup(ns, *i);
+ if (r < 0)
+ return r;
+ }
+
+ set_free_free(l->dnssec_negative_trust_anchors);
+ l->dnssec_negative_trust_anchors = TAKE_PTR(ns);
+
+ (void) link_save_user(l);
+
+ return sd_bus_reply_method_return(message, NULL);
+}
+
+int bus_link_method_revert(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ Link *l = userdata;
+ int r;
+
+ assert(message);
+ assert(l);
+
+ r = verify_unmanaged_link(l, error);
+ if (r < 0)
+ return r;
+
+ link_flush_settings(l);
+ link_allocate_scopes(l);
+ link_add_rrs(l, false);
+
+ (void) link_save_user(l);
+ (void) manager_write_resolv_conf(l->manager);
+
+ return sd_bus_reply_method_return(message, NULL);
+}
+
+const sd_bus_vtable link_vtable[] = {
+ SD_BUS_VTABLE_START(0),
+
+ SD_BUS_PROPERTY("ScopesMask", "t", property_get_scopes_mask, 0, 0),
+ SD_BUS_PROPERTY("DNS", "a(iay)", property_get_dns, 0, 0),
+ SD_BUS_PROPERTY("CurrentDNSServer", "(iay)", property_get_current_dns_server, offsetof(Link, current_dns_server), 0),
+ SD_BUS_PROPERTY("Domains", "a(sb)", property_get_domains, 0, 0),
+ SD_BUS_PROPERTY("DefaultRoute", "b", property_get_default_route, 0, 0),
+ SD_BUS_PROPERTY("LLMNR", "s", bus_property_get_resolve_support, offsetof(Link, llmnr_support), 0),
+ SD_BUS_PROPERTY("MulticastDNS", "s", bus_property_get_resolve_support, offsetof(Link, mdns_support), 0),
+ SD_BUS_PROPERTY("DNSOverTLS", "s", property_get_dns_over_tls_mode, 0, 0),
+ SD_BUS_PROPERTY("DNSSEC", "s", property_get_dnssec_mode, 0, 0),
+ SD_BUS_PROPERTY("DNSSECNegativeTrustAnchors", "as", property_get_ntas, 0, 0),
+ SD_BUS_PROPERTY("DNSSECSupported", "b", property_get_dnssec_supported, 0, 0),
+
+ SD_BUS_METHOD("SetDNS", "a(iay)", NULL, bus_link_method_set_dns_servers, 0),
+ SD_BUS_METHOD("SetDomains", "a(sb)", NULL, bus_link_method_set_domains, 0),
+ SD_BUS_METHOD("SetDefaultRoute", "b", NULL, bus_link_method_set_default_route, 0),
+ SD_BUS_METHOD("SetLLMNR", "s", NULL, bus_link_method_set_llmnr, 0),
+ SD_BUS_METHOD("SetMulticastDNS", "s", NULL, bus_link_method_set_mdns, 0),
+ SD_BUS_METHOD("SetDNSOverTLS", "s", NULL, bus_link_method_set_dns_over_tls, 0),
+ SD_BUS_METHOD("SetDNSSEC", "s", NULL, bus_link_method_set_dnssec, 0),
+ SD_BUS_METHOD("SetDNSSECNegativeTrustAnchors", "as", NULL, bus_link_method_set_dnssec_negative_trust_anchors, 0),
+ SD_BUS_METHOD("Revert", NULL, NULL, bus_link_method_revert, 0),
+
+ SD_BUS_VTABLE_END
+};
+
+int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
+ _cleanup_free_ char *e = NULL;
+ Manager *m = userdata;
+ int ifindex;
+ Link *link;
+ int r;
+
+ assert(bus);
+ assert(path);
+ assert(interface);
+ assert(found);
+ assert(m);
+
+ r = sd_bus_path_decode(path, "/org/freedesktop/resolve1/link", &e);
+ if (r <= 0)
+ return 0;
+
+ r = parse_ifindex(e, &ifindex);
+ if (r < 0)
+ return 0;
+
+ link = hashmap_get(m->links, INT_TO_PTR(ifindex));
+ if (!link)
+ return 0;
+
+ *found = link;
+ return 1;
+}
+
+char *link_bus_path(Link *link) {
+ _cleanup_free_ char *ifindex = NULL;
+ char *p;
+ int r;
+
+ assert(link);
+
+ if (asprintf(&ifindex, "%i", link->ifindex) < 0)
+ return NULL;
+
+ r = sd_bus_path_encode("/org/freedesktop/resolve1/link", ifindex, &p);
+ if (r < 0)
+ return NULL;
+
+ return p;
+}
+
+int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
+ _cleanup_strv_free_ char **l = NULL;
+ Manager *m = userdata;
+ Link *link;
+ Iterator i;
+ unsigned c = 0;
+
+ assert(bus);
+ assert(path);
+ assert(m);
+ assert(nodes);
+
+ l = new0(char*, hashmap_size(m->links) + 1);
+ if (!l)
+ return -ENOMEM;
+
+ HASHMAP_FOREACH(link, m->links, i) {
+ char *p;
+
+ p = link_bus_path(link);
+ if (!p)
+ return -ENOMEM;
+
+ l[c++] = p;
+ }
+
+ l[c] = NULL;
+ *nodes = TAKE_PTR(l);
+
+ return 1;
+}
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