X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fnetwork%2Fnetworkd-link.c;h=87bdd85644dc480ae643426a09a2f1f172bd8653;hb=af93291cc4cbd2fe2fb4af7d3c56138fb39f31dc;hp=14c0417d83a1a1e3bf3bc6c58a04af173e1b3ccf;hpb=563c69c6b2c2bd691352ef522cb9ec95c08a0c63;p=elogind.git

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 14c0417d8..87bdd8564 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -24,6 +24,7 @@
 #include <unistd.h>
 
 #include "networkd.h"
+#include "networkd-netdev.h"
 #include "libudev-private.h"
 #include "udev-util.h"
 #include "util.h"
@@ -41,11 +42,10 @@ static bool ipv4ll_is_bound(sd_ipv4ll *ll);
 static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) {
         _cleanup_link_unref_ Link *link = NULL;
         uint16_t type;
-        char *ifname;
+        const char *ifname;
         int r, ifindex;
 
         assert(manager);
-        assert(manager->links);
         assert(message);
         assert(ret);
 
@@ -81,17 +81,19 @@ static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) {
         if (r < 0)
                 log_debug_link(link, "MAC address not found for new device, continuing without");
 
-        r = asprintf(&link->state_file, "/run/systemd/netif/links/%"PRIu64,
-                     link->ifindex);
+        r = asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex);
         if (r < 0)
                 return -ENOMEM;
 
-        r = asprintf(&link->lease_file, "/run/systemd/netif/leases/%"PRIu64,
-                     link->ifindex);
+        r = asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex);
         if (r < 0)
                 return -ENOMEM;
 
-        r = hashmap_put(manager->links, &link->ifindex, link);
+        r = hashmap_ensure_allocated(&manager->links, NULL, NULL);
+        if (r < 0)
+                return r;
+
+        r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
         if (r < 0)
                 return r;
 
@@ -128,7 +130,7 @@ static void link_free(Link *link) {
         sd_icmp6_nd_unref(link->icmp6_router_discovery);
 
         if (link->manager)
-                hashmap_remove(link->manager->links, &link->ifindex);
+                hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex));
 
         free(link->ifname);
 
@@ -156,15 +158,12 @@ Link *link_ref(Link *link) {
 
 int link_get(Manager *m, int ifindex, Link **ret) {
         Link *link;
-        uint64_t ifindex_64;
 
         assert(m);
-        assert(m->links);
         assert(ifindex);
         assert(ret);
 
-        ifindex_64 = ifindex;
-        link = hashmap_get(m->links, &ifindex_64);
+        link = hashmap_get(m->links, INT_TO_PTR(ifindex));
         if (!link)
                 return -ENODEV;
 
@@ -284,7 +283,7 @@ static Address* link_find_dhcp_server_address(Link *link) {
                 if (address->family != AF_INET)
                         continue;
 
-                if (in_addr_null(address->family, &address->in_addr))
+                if (in_addr_is_null(address->family, &address->in_addr))
                         continue;
 
                 return address;
@@ -400,23 +399,21 @@ static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 
 static int link_set_dhcp_routes(Link *link) {
         struct sd_dhcp_route *static_routes;
-        size_t static_routes_size;
-        int r;
-        unsigned i;
+        int r, n, i;
 
         assert(link);
 
-        r = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes, &static_routes_size);
-        if (r < 0) {
-                if (r != -ENOENT)
-                        log_warning_link(link, "DHCP error: could not get routes: %s", strerror(-r));
-                return r;
+        n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
+        if (n < 0) {
+                if (n != -ENOENT)
+                        log_warning_link(link, "DHCP error: could not get routes: %s", strerror(-n));
+                return n;
         }
 
-        for (i = 0; i < static_routes_size; i++) {
+        for (i = 0; i < n; i++) {
                 _cleanup_route_free_ Route *route = NULL;
 
-                r = route_new_dynamic(&route);
+                r = route_new_dynamic(&route, RTPROT_DHCP);
                 if (r < 0) {
                         log_error_link(link, "Could not allocate route: %s",
                                        strerror(-r));
@@ -427,7 +424,7 @@ static int link_set_dhcp_routes(Link *link) {
                 route->in_addr.in = static_routes[i].gw_addr;
                 route->dst_addr.in = static_routes[i].dst_addr;
                 route->dst_prefixlen = static_routes[i].dst_prefixlen;
-                route->metrics = DHCP_STATIC_ROUTE_METRIC;
+                route->metrics = DHCP_ROUTE_METRIC;
 
                 r = route_configure(route, link, &route_handler);
                 if (r < 0) {
@@ -472,17 +469,9 @@ static int link_enter_set_routes(Link *link) {
 
         if (link->ipv4ll && !link->dhcp_lease) {
                 _cleanup_route_free_ Route *route = NULL;
-                struct in_addr addr;
-
-                r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
-                if (r < 0 && r != -ENOENT) {
-                        log_warning_link(link, "IPV4LL error: no address: %s",
-                                        strerror(-r));
-                        return r;
-                }
 
                 if (r != -ENOENT) {
-                        r = route_new_dynamic(&route);
+                        r = route_new_dynamic(&route, RTPROT_STATIC);
                         if (r < 0) {
                                 log_error_link(link, "Could not allocate route: %s",
                                                strerror(-r));
@@ -491,7 +480,7 @@ static int link_enter_set_routes(Link *link) {
 
                         route->family = AF_INET;
                         route->scope = RT_SCOPE_LINK;
-                        route->metrics = 99;
+                        route->metrics = IPV4LL_ROUTE_METRIC;
 
                         r = route_configure(route, link, &route_handler);
                         if (r < 0) {
@@ -518,14 +507,14 @@ static int link_enter_set_routes(Link *link) {
                 }
 
                 if (r >= 0) {
-                        r = route_new_dynamic(&route);
+                        r = route_new_dynamic(&route, RTPROT_DHCP);
                         if (r < 0) {
                                 log_error_link(link, "Could not allocate route: %s",
                                                strerror(-r));
                                 return r;
                         }
 
-                        r = route_new_dynamic(&route_gw);
+                        r = route_new_dynamic(&route_gw, RTPROT_DHCP);
                         if (r < 0) {
                                 log_error_link(link, "Could not allocate route: %s",
                                                strerror(-r));
@@ -539,7 +528,7 @@ static int link_enter_set_routes(Link *link) {
                         route_gw->dst_addr.in = gateway;
                         route_gw->dst_prefixlen = 32;
                         route_gw->scope = RT_SCOPE_LINK;
-                        route_gw->metrics = DHCP_STATIC_ROUTE_METRIC;
+                        route_gw->metrics = DHCP_ROUTE_METRIC;
 
                         r = route_configure(route_gw, link, &route_handler);
                         if (r < 0) {
@@ -552,7 +541,7 @@ static int link_enter_set_routes(Link *link) {
 
                         route->family = AF_INET;
                         route->in_addr.in = gateway;
-                        route->metrics = DHCP_STATIC_ROUTE_METRIC;
+                        route->metrics = DHCP_ROUTE_METRIC;
 
                         r = route_configure(route, link, &route_handler);
                         if (r < 0) {
@@ -596,13 +585,38 @@ static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata)
                                 "ERRNO=%d", -r,
                                 NULL);
 
-        return 0;
+        return 1;
+}
+
+static int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+        _cleanup_link_unref_ Link *link = userdata;
+        int r;
+
+        assert(rtnl);
+        assert(m);
+        assert(link);
+        assert(link->manager);
+
+        for (; m; m = sd_rtnl_message_next(m)) {
+                r = sd_rtnl_message_get_errno(m);
+                if (r < 0) {
+                        log_debug_link(link, "getting address failed: %s", strerror(-r));
+                        continue;
+                }
+
+                r = link_rtnl_process_address(rtnl, m, link->manager);
+                if (r < 0)
+                        log_warning_link(link, "could not process address: %s", strerror(-r));
+        }
+
+        return 1;
 }
 
 static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
         _cleanup_link_unref_ Link *link = userdata;
         int r;
 
+        assert(rtnl);
         assert(m);
         assert(link);
         assert(link->ifname);
@@ -623,6 +637,11 @@ static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
                                 link->ifname, strerror(-r),
                                 "ERRNO=%d", -r,
                                 NULL);
+        else if (r >= 0) {
+                /* calling handler directly so take a ref */
+                link_ref(link);
+                link_get_address_handler(rtnl, m, link);
+        }
 
         if (link->addr_messages == 0) {
                 log_debug_link(link, "addresses set");
@@ -779,7 +798,7 @@ static int address_update_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userd
                                 "ERRNO=%d", -r,
                                 NULL);
 
-        return 0;
+        return 1;
 }
 
 static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
@@ -802,7 +821,7 @@ static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdat
                                 "ERRNO=%d", -r,
                                 NULL);
 
-        return 0;
+        return 1;
 }
 
 static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
@@ -816,7 +835,9 @@ static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata,
 
         r = sd_bus_message_get_errno(m);
         if (r < 0)
-                log_warning_link(link, "Could not set hostname: %s", strerror(-r));
+                r = -r;
+        if (r > 0)
+                log_warning_link(link, "Could not set hostname: %s", strerror(r));
 
         return 1;
 }
@@ -924,7 +945,6 @@ static int dhcp_lease_lost(Link *link) {
         struct in_addr netmask;
         struct in_addr gateway;
         unsigned prefixlen;
-        unsigned i;
         int r;
 
         assert(link);
@@ -934,14 +954,14 @@ static int dhcp_lease_lost(Link *link) {
 
         if (link->network->dhcp_routes) {
                 struct sd_dhcp_route *routes;
-                size_t routes_size;
+                int n, i;
 
-                r = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes, &routes_size);
-                if (r >= 0) {
-                        for (i = 0; i < routes_size; i++) {
+                n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes);
+                if (n >= 0) {
+                        for (i = 0; i < n; i++) {
                                 _cleanup_route_free_ Route *route = NULL;
 
-                                r = route_new_dynamic(&route);
+                                r = route_new_dynamic(&route, RTPROT_UNSPEC);
                                 if (r >= 0) {
                                         route->family = AF_INET;
                                         route->in_addr.in = routes[i].gw_addr;
@@ -961,7 +981,7 @@ static int dhcp_lease_lost(Link *link) {
                         _cleanup_route_free_ Route *route_gw = NULL;
                         _cleanup_route_free_ Route *route = NULL;
 
-                        r = route_new_dynamic(&route_gw);
+                        r = route_new_dynamic(&route_gw, RTPROT_UNSPEC);
                         if (r >= 0) {
                                 route_gw->family = AF_INET;
                                 route_gw->dst_addr.in = gateway;
@@ -971,7 +991,7 @@ static int dhcp_lease_lost(Link *link) {
                                 route_drop(route_gw, link, &route_drop_handler);
                         }
 
-                        r = route_new_dynamic(&route);
+                        r = route_new_dynamic(&route, RTPROT_UNSPEC);
                         if (r >= 0) {
                                 route->family = AF_INET;
                                 route->in_addr.in = gateway;
@@ -1152,9 +1172,6 @@ static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
                 return;
 
         switch (event) {
-                case DHCP_EVENT_NO_LEASE:
-                        log_debug_link(link, "IP address in use.");
-                        break;
                 case DHCP_EVENT_EXPIRED:
                 case DHCP_EVENT_STOP:
                 case DHCP_EVENT_IP_CHANGE:
@@ -1288,7 +1305,7 @@ static int ipv4ll_address_lost(Link *link) {
 
                 address_drop(address, link, &address_drop_handler);
 
-                r = route_new_dynamic(&route);
+                r = route_new_dynamic(&route, RTPROT_UNSPEC);
                 if (r < 0) {
                         log_error_link(link, "Could not allocate route: %s",
                                        strerror(-r));
@@ -1702,14 +1719,14 @@ static int link_up(Link *link) {
         return 0;
 }
 
-static int link_enslaved(Link *link) {
+static int link_joined(Link *link) {
         int r;
 
         assert(link);
         assert(link->state == LINK_STATE_ENSLAVING);
         assert(link->network);
 
-        log_debug_link(link, "enslaved");
+        log_debug_link(link, "joined netdev");
 
         if (!(link->flags & IFF_UP)) {
                 r = link_up(link);
@@ -1722,7 +1739,7 @@ static int link_enslaved(Link *link) {
         return link_enter_set_addresses(link);
 }
 
-static int enslave_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+static int netdev_join_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
         _cleanup_link_unref_ Link *link = userdata;
         int r;
 
@@ -1739,7 +1756,7 @@ static int enslave_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
         r = sd_rtnl_message_get_errno(m);
         if (r < 0 && r != -EEXIST) {
                 log_struct_link(LOG_ERR, link,
-                                "MESSAGE=%-*s: could not enslave: %s",
+                                "MESSAGE=%-*s: could not join netdev: %s",
                                 IFNAMSIZ,
                                 link->ifname, strerror(-r),
                                 "ERRNO=%d", -r,
@@ -1749,13 +1766,13 @@ static int enslave_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
         }
 
         if (link->enslaving <= 0)
-                link_enslaved(link);
+                link_joined(link);
 
         return 1;
 }
 
-static int link_enter_enslave(Link *link) {
-        NetDev *vlan, *macvlan, *vxlan;
+static int link_enter_join_netdev(Link *link) {
+        NetDev *netdev;
         Iterator i;
         int r;
 
@@ -1769,27 +1786,24 @@ static int link_enter_enslave(Link *link) {
 
         if (!link->network->bridge &&
             !link->network->bond &&
-            !link->network->tunnel &&
-            hashmap_isempty(link->network->vlans) &&
-            hashmap_isempty(link->network->macvlans) &&
-            hashmap_isempty(link->network->vxlans))
-                return link_enslaved(link);
+            hashmap_isempty(link->network->stacked_netdevs))
+                return link_joined(link);
 
         if (link->network->bond) {
                 log_struct_link(LOG_DEBUG, link,
                                 "MESSAGE=%-*s: enslaving by '%s'",
                                 IFNAMSIZ,
                                 link->ifname, link->network->bond->ifname,
-                                NETDEV(link->network->bond),
+                                NETDEVIF(link->network->bond),
                                 NULL);
 
-                r = netdev_enslave(link->network->bond, link, &enslave_handler);
+                r = netdev_join(link->network->bond, link, &netdev_join_handler);
                 if (r < 0) {
                         log_struct_link(LOG_WARNING, link,
-                                        "MESSAGE=%-*s: could not enslave by '%s': %s",
+                                        "MESSAGE=%-*s: could not join netdev '%s': %s",
                                         IFNAMSIZ,
                                         link->ifname, link->network->bond->ifname, strerror(-r),
-                                        NETDEV(link->network->bond),
+                                        NETDEVIF(link->network->bond),
                                         NULL);
                         link_enter_failed(link);
                         return r;
@@ -1803,39 +1817,16 @@ static int link_enter_enslave(Link *link) {
                                 "MESSAGE=%-*s: enslaving by '%s'",
                                 IFNAMSIZ,
                                 link->ifname, link->network->bridge->ifname,
-                                NETDEV(link->network->bridge),
+                                NETDEVIF(link->network->bridge),
                                 NULL);
 
-                r = netdev_enslave(link->network->bridge, link, &enslave_handler);
+                r = netdev_join(link->network->bridge, link, &netdev_join_handler);
                 if (r < 0) {
                         log_struct_link(LOG_WARNING, link,
-                                        "MESSAGE=%-*s: could not enslave by '%s': %s",
+                                        "MESSAGE=%-*s: could not join netdev '%s': %s",
                                         IFNAMSIZ,
                                         link->ifname, link->network->bridge->ifname, strerror(-r),
-                                        NETDEV(link->network->bridge),
-                                        NULL);
-                        link_enter_failed(link);
-                        return r;
-                }
-
-                link->enslaving ++;
-        }
-
-        if (link->network->tunnel) {
-                log_struct_link(LOG_DEBUG, link,
-                                "MESSAGE=%-*s: enslaving by '%s'",
-                                IFNAMSIZ,
-                                link->ifname, link->network->tunnel->ifname,
-                                NETDEV(link->network->tunnel),
-                                NULL);
-
-                r = netdev_enslave(link->network->tunnel, link, &enslave_handler);
-                if (r < 0) {
-                        log_struct_link(LOG_WARNING, link,
-                                        "MESSAGE=%-*s: could not enslave by '%s': %s",
-                                        IFNAMSIZ,
-                                        link->ifname, link->network->tunnel->ifname, strerror(-r),
-                                        NETDEV(link->network->tunnel),
+                                        NETDEVIF(link->network->bridge),
                                         NULL);
                         link_enter_failed(link);
                         return r;
@@ -1844,59 +1835,19 @@ static int link_enter_enslave(Link *link) {
                 link->enslaving ++;
         }
 
-        HASHMAP_FOREACH(vlan, link->network->vlans, i) {
-                log_struct_link(LOG_DEBUG, link,
-                                "MESSAGE=%-*s: enslaving by '%s'",
-                                IFNAMSIZ,
-                                link->ifname, vlan->ifname, NETDEV(vlan), NULL);
-
-                r = netdev_enslave(vlan, link, &enslave_handler);
-                if (r < 0) {
-                        log_struct_link(LOG_WARNING, link,
-                                        "MESSAGE=%-*s: could not enslave by '%s': %s",
-                                        IFNAMSIZ,
-                                        link->ifname, vlan->ifname, strerror(-r),
-                                        NETDEV(vlan), NULL);
-                        link_enter_failed(link);
-                        return r;
-                }
-
-                link->enslaving ++;
-        }
-
-        HASHMAP_FOREACH(macvlan, link->network->macvlans, i) {
+        HASHMAP_FOREACH(netdev, link->network->stacked_netdevs, i) {
                 log_struct_link(LOG_DEBUG, link,
                                 "MESSAGE=%-*s: enslaving by '%s'",
                                 IFNAMSIZ,
-                                link->ifname, macvlan->ifname, NETDEV(macvlan), NULL);
-
-                r = netdev_enslave(macvlan, link, &enslave_handler);
-                if (r < 0) {
-                        log_struct_link(LOG_WARNING, link,
-                                        "MESSAGE=%-*s: could not enslave by '%s': %s",
-                                        IFNAMSIZ,
-                                        link->ifname, macvlan->ifname, strerror(-r),
-                                        NETDEV(macvlan), NULL);
-                        link_enter_failed(link);
-                        return r;
-                }
-
-                link->enslaving ++;
-        }
-
-        HASHMAP_FOREACH(vxlan, link->network->vxlans, i) {
-                log_struct_link(LOG_DEBUG, link,
-                                "MESSAGE=%*s: enslaving by '%s'",
-                                IFNAMSIZ,
-                                link->ifname, vxlan->ifname, NETDEV(vxlan), NULL);
+                                link->ifname, netdev->ifname, NETDEVIF(netdev), NULL);
 
-                r = netdev_enslave(vxlan, link, &enslave_handler);
+                r = netdev_join(netdev, link, &netdev_join_handler);
                 if (r < 0) {
                         log_struct_link(LOG_WARNING, link,
-                                        "MESSAGE=%*s: could not enslave by '%s': %s",
+                                        "MESSAGE=%-*s: could not join netdev '%s': %s",
                                         IFNAMSIZ,
-                                        link->ifname, vxlan->ifname, strerror(-r),
-                                        NETDEV(vxlan), NULL);
+                                        link->ifname, netdev->ifname, strerror(-r),
+                                        NETDEVIF(netdev), NULL);
                         link_enter_failed(link);
                         return r;
                 }
@@ -1967,6 +1918,10 @@ static int link_configure(Link *link) {
                 if (r < 0)
                         return r;
 
+                r = sd_dhcp_client_set_request_broadcast(link->dhcp_client, link->network->dhcp_broadcast);
+                if (r < 0)
+                        return r;
+
                 if (link->network->dhcp_mtu) {
                         r = sd_dhcp_client_set_request_option(link->dhcp_client, 26);
                         if (r < 0)
@@ -1993,6 +1948,13 @@ static int link_configure(Link *link) {
                                         return r;
                         }
                 }
+
+                if (link->network->dhcp_vendor_class_identifier) {
+                        r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client,
+                                                                       link->network->dhcp_vendor_class_identifier);
+                        if (r < 0)
+                                return r;
+                }
         }
 
         if (link->network->dhcp_server) {
@@ -2037,7 +1999,7 @@ static int link_configure(Link *link) {
                         return r;
         }
 
-        return link_enter_enslave(link);
+        return link_enter_join_netdev(link);
 }
 
 static int link_initialized_and_synced(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
@@ -2084,6 +2046,9 @@ int link_initialized(Link *link, struct udev_device *device) {
         if (link->state != LINK_STATE_INITIALIZING)
                 return 0;
 
+        if (link->udev_device)
+                return 0;
+
         log_debug_link(link, "udev initialized link");
 
         link->udev_device = udev_device_ref(device);
@@ -2140,7 +2105,7 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *use
 
         r = address_new_dynamic(&address);
         if (r < 0)
-                return 0;
+                return r;
 
         r = sd_rtnl_message_addr_get_family(message, &address->family);
         if (r < 0 || !IN_SET(address->family, AF_INET, AF_INET6)) {
@@ -2204,7 +2169,10 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *use
         case RTM_NEWADDR:
                 if (!address_dropped)
                         log_debug_link(link, "added address: %s/%u", buf,
-                                      address->prefixlen);
+                                       address->prefixlen);
+                else
+                        log_debug_link(link, "updated address: %s/%u", buf,
+                                       address->prefixlen);
 
                 LIST_PREPEND(addresses, link->addresses, address);
                 address = NULL;
@@ -2215,10 +2183,12 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *use
         case RTM_DELADDR:
                 if (address_dropped) {
                         log_debug_link(link, "removed address: %s/%u", buf,
-                                      address->prefixlen);
+                                       address->prefixlen);
 
                         link_save(link);
-                }
+                } else
+                        log_warning_link(link, "removing non-existent address: %s/%u",
+                                         buf, address->prefixlen);
 
                 break;
         default:
@@ -2228,30 +2198,6 @@ int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *use
         return 1;
 }
 
-static int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
-        _cleanup_link_unref_ Link *link = userdata;
-        int r;
-
-        assert(rtnl);
-        assert(m);
-        assert(link);
-        assert(link->manager);
-
-        for (; m; m = sd_rtnl_message_next(m)) {
-                r = sd_rtnl_message_get_errno(m);
-                if (r < 0) {
-                        log_debug_link(link, "getting address failed: %s", strerror(-r));
-                        continue;
-                }
-
-                r = link_rtnl_process_address(rtnl, m, link->manager);
-                if (r < 0)
-                        log_warning_link(link, "could not process address: %s", strerror(-r));
-        }
-
-        return 1;
-}
-
 int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
         Link *link;
         _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
@@ -2270,7 +2216,7 @@ int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
 
         link = *ret;
 
-        log_debug_link(link, "link %"PRIu64" added", link->ifindex);
+        log_debug_link(link, "link %d added", link->ifindex);
 
         r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, link->ifindex, 0);
         if (r < 0)
@@ -2284,7 +2230,7 @@ int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
 
         if (detect_container(NULL) <= 0) {
                 /* not in a container, udev will be around */
-                sprintf(ifindex_str, "n%"PRIu64, link->ifindex);
+                sprintf(ifindex_str, "n%d", link->ifindex);
                 device = udev_device_new_from_device_id(m->udev, ifindex_str);
                 if (!device) {
                         log_warning_link(link, "could not find udev device");
@@ -2314,7 +2260,7 @@ int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
 
 int link_update(Link *link, sd_rtnl_message *m) {
         struct ether_addr mac;
-        char *ifname;
+        const char *ifname;
         int r;
 
         assert(link);
@@ -2396,27 +2342,6 @@ int link_update(Link *link, sd_rtnl_message *m) {
         return link_update_flags(link, m);
 }
 
-static void serialize_addresses(FILE *f, const char *key, Address *address) {
-        Address *ad;
-
-        assert(f);
-        assert(key);
-
-        if (!address)
-                return;
-
-        fprintf(f, "%s=", key);
-
-        LIST_FOREACH(addresses, ad, address) {
-                char buf[INET6_ADDRSTRLEN];
-
-                if (inet_ntop(ad->family, &ad->in_addr, buf, INET6_ADDRSTRLEN))
-                        fprintf(f, "%s%s", buf, (ad->addresses_next) ? " ": "");
-        }
-
-        fputs("\n", f);
-}
-
 static void link_update_operstate(Link *link) {
 
         assert(link);
@@ -2483,13 +2408,51 @@ int link_save(Link *link) {
         fprintf(f,
                 "# This is private data. Do not parse.\n"
                 "ADMIN_STATE=%s\n"
-                "OPER_STATE=%s\n"
-                "FLAGS=%u\n",
-                admin_state, oper_state, link->flags);
+                "OPER_STATE=%s\n",
+                admin_state, oper_state);
 
         if (link->network) {
-                serialize_addresses(f, "DNS", link->network->dns);
-                serialize_addresses(f, "NTP", link->network->ntp);
+                char **address;
+
+                fputs("DNS=", f);
+
+                if (link->network->dhcp_dns &&
+                    link->dhcp_lease) {
+                        const struct in_addr *addresses;
+
+                        r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
+                        if (r > 0) {
+                                serialize_in_addrs(f, addresses, r);
+                                if (link->network->dns)
+                                        fputs(" ", f);
+                        }
+                }
+
+                STRV_FOREACH(address, link->network->dns)
+                        fprintf(f, "%s%s", *address,
+                                (address + 1 ? " " : ""));
+
+                fputs("\n", f);
+
+                fprintf(f, "NTP=");
+
+                if (link->network->dhcp_ntp &&
+                    link->dhcp_lease) {
+                        const struct in_addr *addresses;
+
+                        r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
+                        if (r > 0) {
+                                serialize_in_addrs(f, addresses, r);
+                                if (link->network->ntp)
+                                        fputs(" ", f);
+                        }
+                }
+
+                STRV_FOREACH(address, link->network->ntp)
+                        fprintf(f, "%s%s", *address,
+                                (address + 1 ? " " : ""));
+
+                fputs("\n", f);
         }
 
         if (link->dhcp_lease) {
@@ -2500,12 +2463,8 @@ int link_save(Link *link) {
                         goto finish;
 
                 fprintf(f,
-                        "DHCP_LEASE=%s\n"
-                        "DHCP_USE_DNS=%s\n"
-                        "DHCP_USE_NTP=%s\n",
-                        link->lease_file,
-                        yes_no(link->network->dhcp_dns),
-                        yes_no(link->network->dhcp_ntp));
+                        "DHCP_LEASE=%s\n",
+                        link->lease_file);
         } else
                 unlink(link->lease_file);