network/dhcp4: support IPv6 only mode (RFC 8925)

[thirdparty/systemd.git] / src / network / networkd-address.c

diff --git a/src/network/networkd-address.c b/src/network/networkd-address.c
index e2e448b44f5e6e8fa2c14ed96ae33fdcbc36e083..c1a8cd884a81528af0c3219bff855a501cc6d359 100644 (file)
--- a/src/network/networkd-address.c
+++ b/src/network/networkd-address.c
@@ -1669,7 +1669,7 @@ int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message,
         uint16_t type;
         Address *address = NULL;
         Request *req = NULL;
-        bool is_new = false;
+        bool is_new = false, update_dhcp4;
         int ifindex, r;
 
         assert(rtnl);
@@ -1778,6 +1778,8 @@ int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message,
                 assert_not_reached();
         }
 
+        update_dhcp4 = tmp->family == AF_INET6;
+
         /* Then, find the managed Address and Request objects corresponding to the received address. */
         (void) address_get(link, tmp, &address);
         (void) address_get_request(link, tmp, &req);
@@ -1793,7 +1795,7 @@ int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message,
                 if (req)
                         address_enter_removed(req->userdata);
 
-                return 0;
+                goto finalize;
         }
 
         if (!address) {
@@ -1879,6 +1881,15 @@ int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message,
         if (r < 0)
                 link_enter_failed(link);
 
+finalize:
+        if (update_dhcp4) {
+                r = dhcp4_update_ipv6_connectivity(link);
+                if (r < 0) {
+                        log_link_warning_errno(link, r, "Failed to notify IPv6 connectivity to DHCPv4 client: %m");
+                        link_enter_failed(link);
+                }
+        }
+
         return 1;
 }