network: introduce new bus method Renew() and RenewLink()

src/libsystemd/sd-bus/bus-common-errors.c

@@ -103,6 +103,7 @@ BUS_ERROR_MAP_ELF_REGISTER const sd_bus_error_map bus_common_errors[] = {
         SD_BUS_ERROR_MAP(BUS_ERROR_NO_PRODUCT_UUID,              EOPNOTSUPP),
 
         SD_BUS_ERROR_MAP(BUS_ERROR_SPEED_METER_INACTIVE,         EOPNOTSUPP),
+        SD_BUS_ERROR_MAP(BUS_ERROR_UNMANAGED_INTERFACE,          EOPNOTSUPP),
 
         SD_BUS_ERROR_MAP_END
 };

src/libsystemd/sd-bus/bus-common-errors.h

@@ -82,5 +82,6 @@
 #define BUS_ERROR_NO_PRODUCT_UUID "org.freedesktop.hostname1.NoProductUUID"
 
 #define BUS_ERROR_SPEED_METER_INACTIVE "org.freedesktop.network1.SpeedMeterInactive"
+#define BUS_ERROR_UNMANAGED_INTERFACE "org.freedesktop.network1.UnmanagedInterface"
 
 BUS_ERROR_MAP_ELF_USE(bus_common_errors);

src/network/networkd-link-bus.c

@@ -575,6 +575,35 @@ int bus_link_method_revert_dns(sd_bus_message *message, void *userdata, sd_bus_e
         return sd_bus_reply_method_return(message, NULL);
 }
 
+int bus_link_method_renew(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+        Link *l = userdata;
+        int r;
+
+        assert(l);
+
+        if (!l->network)
+                return sd_bus_error_setf(error, BUS_ERROR_UNMANAGED_INTERFACE,
+                                         "Interface %s is not managed by systemd-networkd",
+                                         l->ifname);
+
+        r = bus_verify_polkit_async(message, CAP_NET_ADMIN,
+                                    "org.freedesktop.network1.renew",
+                                    NULL, true, UID_INVALID,
+                                    &l->manager->polkit_registry, error);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return 1; /* Polkit will call us back */
+
+        if (l->dhcp_client) {
+                r = sd_dhcp_client_send_renew(l->dhcp_client);
+                if (r < 0)
+                        return r;
+        }
+
+        return sd_bus_reply_method_return(message, NULL);
+}
+
 const sd_bus_vtable link_vtable[] = {
         SD_BUS_VTABLE_START(0),
 
@@ -595,6 +624,7 @@ const sd_bus_vtable link_vtable[] = {
         SD_BUS_METHOD("SetDNSSECNegativeTrustAnchors", "as", NULL, bus_link_method_set_dnssec_negative_trust_anchors, SD_BUS_VTABLE_UNPRIVILEGED),
         SD_BUS_METHOD("RevertNTP", NULL, NULL, bus_link_method_revert_ntp, SD_BUS_VTABLE_UNPRIVILEGED),
         SD_BUS_METHOD("RevertDNS", NULL, NULL, bus_link_method_revert_dns, SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD("Renew", NULL, NULL, bus_link_method_renew, SD_BUS_VTABLE_UNPRIVILEGED),
 
         SD_BUS_VTABLE_END
 };

src/network/networkd-link-bus.h

@@ -30,3 +30,4 @@ int bus_link_method_set_dnssec(sd_bus_message *message, void *userdata, sd_bus_e
 int bus_link_method_set_dnssec_negative_trust_anchors(sd_bus_message *message, void *userdata, sd_bus_error *error);
 int bus_link_method_revert_ntp(sd_bus_message *message, void *userdata, sd_bus_error *error);
 int bus_link_method_revert_dns(sd_bus_message *message, void *userdata, sd_bus_error *error);
+int bus_link_method_renew(sd_bus_message *message, void *userdata, sd_bus_error *error);

src/network/networkd-manager-bus.c

@@ -183,6 +183,10 @@ static int bus_method_revert_link_dns(sd_bus_message *message, void *userdata, s
         return call_link_method(userdata, message, bus_link_method_revert_dns, error);
 }
 
+static int bus_method_renew_link(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+        return call_link_method(userdata, message, bus_link_method_renew, error);
+}
+
 const sd_bus_vtable manager_vtable[] = {
         SD_BUS_VTABLE_START(0),
 
@@ -204,6 +208,7 @@ const sd_bus_vtable manager_vtable[] = {
         SD_BUS_METHOD("SetLinkDNSSECNegativeTrustAnchors", "ias", NULL, bus_method_set_link_dnssec_negative_trust_anchors, SD_BUS_VTABLE_UNPRIVILEGED),
         SD_BUS_METHOD("RevertLinkNTP", "i", NULL, bus_method_revert_link_ntp, SD_BUS_VTABLE_UNPRIVILEGED),
         SD_BUS_METHOD("RevertLinkDNS", "i", NULL, bus_method_revert_link_dns, SD_BUS_VTABLE_UNPRIVILEGED),
+        SD_BUS_METHOD("RenewLink", "i", NULL, bus_method_renew_link, SD_BUS_VTABLE_UNPRIVILEGED),
 
         SD_BUS_VTABLE_END
 };

src/network/org.freedesktop.network1.policy

@@ -139,4 +139,15 @@
                 <annotate key="org.freedesktop.policykit.owner">unix-user:systemd-network</annotate>
         </action>
 
+        <action id="org.freedesktop.network1.renew">
+                <description gettext-domain="systemd">Renew dynamic addresses</description>
+                <message gettext-domain="systemd">Authentication is required to renew dynamic addresses.</message>
+                <defaults>
+                        <allow_any>auth_admin</allow_any>
+                        <allow_inactive>auth_admin</allow_inactive>
+                        <allow_active>auth_admin_keep</allow_active>
+                </defaults>
+                <annotate key="org.freedesktop.policykit.owner">unix-user:systemd-network</annotate>
+        </action>
+
 </policyconfig>