+static int
+route_cmp(const void *k1, const void *k2, void *ptr)
+{
+ return memcmp(k1, k2, sizeof(struct device_route) -
+ offsetof(struct device_route, mask));
+}
+
+static void
+interface_update_proto_addr(struct vlist_tree *tree,
+ struct vlist_node *node_new,
+ struct vlist_node *node_old)
+{
+ struct interface_ip_settings *ip;
+ struct interface *iface;
+ struct device *dev;
+ struct device_addr *a_new = NULL, *a_old = NULL;
+ bool keep = false;
+
+ ip = container_of(tree, struct interface_ip_settings, addr);
+ iface = ip->iface;
+ dev = iface->l3_dev->dev;
+
+ if (node_new) {
+ a_new = container_of(node_new, struct device_addr, node);
+
+ if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
+ !a_new->broadcast) {
+
+ uint32_t mask = ~0;
+ uint32_t *a = (uint32_t *) &a_new->addr;
+
+ mask >>= a_new->mask;
+ a_new->broadcast = *a | mask;
+ }
+ }
+
+ if (node_old)
+ a_old = container_of(node_old, struct device_addr, node);
+
+ if (a_new && a_old) {
+ keep = true;
+
+ if (a_old->flags != a_new->flags)
+ keep = false;
+
+ if ((a_new->flags & DEVADDR_FAMILY) == DEVADDR_INET4 &&
+ a_new->broadcast != a_old->broadcast)
+ keep = false;
+ }
+
+ if (node_old) {
+ if (!(a_old->flags & DEVADDR_EXTERNAL) && a_old->enabled && !keep)
+ system_del_address(dev, a_old);
+ free(a_old);
+ }
+
+ if (node_new) {
+ if (!(a_new->flags & DEVADDR_EXTERNAL) && !keep)
+ system_add_address(dev, a_new);
+ a_new->enabled = true;
+ }
+}
+
+static bool
+enable_route(struct interface_ip_settings *ip, struct device_route *route)
+{
+ if (ip->no_defaultroute && !route->mask)
+ return false;
+
+ return true;
+}
+
+static void
+interface_update_proto_route(struct vlist_tree *tree,
+ struct vlist_node *node_new,
+ struct vlist_node *node_old)
+{
+ struct interface_ip_settings *ip;
+ struct interface *iface;
+ struct device *dev;
+ struct device_route *route_old, *route_new;
+ bool keep = false;
+
+ ip = container_of(tree, struct interface_ip_settings, route);
+ iface = ip->iface;
+ dev = iface->l3_dev->dev;
+
+ route_old = container_of(node_old, struct device_route, node);
+ route_new = container_of(node_new, struct device_route, node);
+
+ if (node_old && node_new)
+ keep = !memcmp(&route_old->nexthop, &route_new->nexthop, sizeof(route_old->nexthop));
+
+ if (node_old) {
+ if (!(route_old->flags & DEVADDR_EXTERNAL) && route_old->enabled && !keep)
+ system_del_route(dev, route_old);
+ free(route_old);
+ }
+
+ if (node_new) {
+ bool _enabled = enable_route(ip, route_new);
+
+ if (!(route_new->flags & DEVADDR_EXTERNAL) && !keep && _enabled)
+ system_add_route(dev, route_new);
+
+ route_new->enabled = _enabled;
+ }
+}
+
+void
+interface_add_dns_server(struct interface_ip_settings *ip, const char *str)
+{
+ struct dns_server *s;
+
+ s = calloc(1, sizeof(*s));
+ s->af = AF_INET;
+ if (inet_pton(s->af, str, &s->addr.in))
+ goto add;
+
+ s->af = AF_INET6;
+ if (inet_pton(s->af, str, &s->addr.in))
+ goto add;
+
+ free(s);
+ return;
+
+add:
+ D(INTERFACE, "Add IPv%c DNS server: %s\n",
+ s->af == AF_INET6 ? '6' : '4', str);
+ vlist_simple_add(&ip->dns_servers, &s->node);
+}
+
+void
+interface_add_dns_server_list(struct interface_ip_settings *ip, struct blob_attr *list)
+{
+ struct blob_attr *cur;
+ int rem;
+
+ blobmsg_for_each_attr(cur, list, rem) {
+ if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
+ continue;
+
+ if (!blobmsg_check_attr(cur, NULL))
+ continue;
+
+ interface_add_dns_server(ip, blobmsg_data(cur));
+ }
+}
+
+static void
+interface_add_dns_search_domain(struct interface_ip_settings *ip, const char *str)
+{
+ struct dns_search_domain *s;
+ int len = strlen(str);
+
+ s = calloc(1, sizeof(*s) + len + 1);
+ if (!s)
+ return;
+
+ D(INTERFACE, "Add DNS search domain: %s\n", str);
+ memcpy(s->name, str, len);
+ vlist_simple_add(&ip->dns_search, &s->node);
+}
+
+void
+interface_add_dns_search_list(struct interface_ip_settings *ip, struct blob_attr *list)
+{
+ struct blob_attr *cur;
+ int rem;
+
+ blobmsg_for_each_attr(cur, list, rem) {
+ if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
+ continue;
+
+ if (!blobmsg_check_attr(cur, NULL))
+ continue;
+
+ interface_add_dns_search_domain(ip, blobmsg_data(cur));
+ }
+}
+
+static void
+write_resolv_conf_entries(FILE *f, struct interface_ip_settings *ip)
+{
+ struct dns_server *s;
+ struct dns_search_domain *d;
+ const char *str;
+ char buf[32];
+
+ vlist_simple_for_each_element(&ip->dns_servers, s, node) {
+ str = inet_ntop(s->af, &s->addr, buf, sizeof(buf));
+ if (!str)
+ continue;
+
+ fprintf(f, "nameserver %s\n", str);
+ }
+
+ vlist_simple_for_each_element(&ip->dns_search, d, node) {
+ fprintf(f, "search %s\n", d->name);
+ }
+}
+
+void
+interface_write_resolv_conf(void)
+{
+ struct interface *iface;
+ char *path = alloca(strlen(resolv_conf) + 5);
+ FILE *f;
+
+ sprintf(path, "%s.tmp", resolv_conf);
+ unlink(path);
+ f = fopen(path, "w");
+ if (!f) {
+ D(INTERFACE, "Failed to open %s for writing\n", path);
+ return;
+ }
+
+ vlist_for_each_element(&interfaces, iface, node) {
+ if (iface->state != IFS_UP)
+ continue;