resolved: teach resolved the difference between "routing" and "search" domains

Following the changes to expose the "routing" and "search" domain concepts in networkd, actually make resolved use
them. It will now use routing domains exclusively for making DNS routing decisions, and use search domains additionally
for extending single-label names.

1 files changed, 38 insertions, 14 deletions

diff --git a/src/resolve/resolved-link-bus.c b/src/resolve/resolved-link-bus.c
index 2ca7ece851..e6b087f412 100644
--- a/src/resolve/resolved-link-bus.c
+++ b/src/resolve/resolved-link-bus.c
@@ -75,12 +75,12 @@ static int property_get_domains(
         assert(reply);
         assert(l);
 
-        r = sd_bus_message_open_container(reply, 'a', "s");
+        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, "s", d->name);
+                r = sd_bus_message_append(reply, "(sb)", d->name, d->route_only);
                 if (r < 0)
                         return r;
         }
@@ -242,47 +242,71 @@ clear:
 }
 
 int bus_link_method_set_search_domains(sd_bus_message *message, void *userdata, sd_bus_error *error) {
-        _cleanup_free_ char **domains = NULL;
         Link *l = userdata;
-        char **i;
         int r;
 
         assert(message);
         assert(l);
 
-        r = sd_bus_message_read_strv(message, &domains);
+        r = sd_bus_message_enter_container(message, 'a', "(sb)");
         if (r < 0)
                 return r;
 
-        STRV_FOREACH(i, domains) {
+        for (;;) {
+                const char *name;
+                int route_only;
 
-                r = dns_name_is_valid(*i);
+                r = sd_bus_message_read(message, "(sb)", &name, &route_only);
                 if (r < 0)
                         return r;
                 if (r == 0)
-                        return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid search domain %s", *i);
-                if (dns_name_is_root(*i))
+                        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);
 
-        STRV_FOREACH(i, domains) {
+        r = sd_bus_message_rewind(message, false);
+        if (r < 0)
+                return r;
+
+        for (;;) {
                 DnsSearchDomain *d;
+                const char *name;
+                int route_only;
 
-                r = dns_search_domain_find(l->search_domains, *i, &d);
+                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, NULL, DNS_SEARCH_DOMAIN_LINK, l, *i);
+                        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);
         return sd_bus_reply_method_return(message, NULL);
 
@@ -430,7 +454,7 @@ const sd_bus_vtable link_vtable[] = {
 
         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("Domains", "as", property_get_domains, 0, 0),
+        SD_BUS_PROPERTY("Domains", "a(sb)", property_get_domains, 0, 0),
         SD_BUS_PROPERTY("LLMNR", "s", property_get_resolve_support, offsetof(Link, llmnr_support), 0),
         SD_BUS_PROPERTY("MulticastDNS", "s", property_get_resolve_support, offsetof(Link, mdns_support), 0),
         SD_BUS_PROPERTY("DNSSEC", "s", property_get_dnssec_mode, offsetof(Link, dnssec_mode), 0),
@@ -438,7 +462,7 @@ const sd_bus_vtable link_vtable[] = {
         SD_BUS_PROPERTY("DNSSECSupport", "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", "as", NULL, bus_link_method_set_search_domains, 0),
+        SD_BUS_METHOD("SetDomains", "a(sb)", NULL, bus_link_method_set_search_domains, 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("SetDNSSEC", "s", NULL, bus_link_method_set_dnssec, 0),