Remove automatically assigned IPv6 routing table

[project/netifd.git] / interface.c

diff --git a/interface.c b/interface.c
index 81de337..b2c8baf 100644 (file)
--- a/interface.c
+++ b/interface.c
@@ -26,7 +26,6 @@
 
 struct vlist_tree interfaces;
 static LIST_HEAD(iface_all_users);
-static unsigned int interface_serial = 0;
 
 enum {
        IFACE_ATTR_IFNAME,
@@ -43,6 +42,7 @@ enum {
        IFACE_ATTR_IP4TABLE,
        IFACE_ATTR_IP6TABLE,
        IFACE_ATTR_IP6CLASS,
+       IFACE_ATTR_DELEGATE,
        IFACE_ATTR_MAX
 };
 
@@ -61,6 +61,7 @@ static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
        [IFACE_ATTR_IP4TABLE] = { .name = "ip4table", .type = BLOBMSG_TYPE_STRING },
        [IFACE_ATTR_IP6TABLE] = { .name = "ip6table", .type = BLOBMSG_TYPE_STRING },
        [IFACE_ATTR_IP6CLASS] = { .name = "ip6class", .type = BLOBMSG_TYPE_ARRAY },
+       [IFACE_ATTR_DELEGATE] = { .name = "delegate", .type = BLOBMSG_TYPE_BOOL },
 };
 
 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
@@ -149,15 +150,23 @@ interface_add_data(struct interface *iface, const struct blob_attr *data)
        if (!blobmsg_check_attr(data, true))
                return UBUS_STATUS_INVALID_ARGUMENT;
 
-       n = calloc(1, sizeof(*n) + blob_pad_len(data));
-       memcpy(n->data, data, blob_pad_len(data));
-       n->node.key = blobmsg_name(data);
+       const char *name = blobmsg_name(data);
+       unsigned len = blob_pad_len(data);
+
+       o = avl_find_element(&iface->data, name, o, node);
+       if (o) {
+               if (blob_pad_len(o->data) == len && !memcmp(o->data, data, len))
+                       return 0;
 
-       o = avl_find_element(&iface->data, n->node.key, o, node);
-       if (o)
                interface_data_del(iface, o);
+       }
 
+       n = calloc(1, sizeof(*n) + len);
+       memcpy(n->data, data, len);
+       n->node.key = blobmsg_name(n->data);
        avl_insert(&iface->data, &n->node);
+
+       iface->updated |= IUF_DATA;
        return 0;
 }
 
@@ -220,6 +229,9 @@ __interface_set_down(struct interface *iface, bool force)
        interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, force);
        if (force)
                interface_flush_state(iface);
+
+       if (iface->dynamic)
+               vlist_delete(&interfaces, &iface->node);
 }
 
 static void
@@ -375,6 +387,7 @@ interface_alias_cb(struct interface_user *dep, struct interface *iface, enum int
                interface_remove_user(dep);
                break;
        case IFEV_RELOAD:
+       case IFEV_UPDATE:
                break;
        }
 }
@@ -480,8 +493,10 @@ interface_proto_cb(struct interface_proto_state *state, enum interface_proto_eve
 
        switch (ev) {
        case IFPEV_UP:
-               if (iface->state != IFS_SETUP)
+               if (iface->state != IFS_SETUP) {
+                       interface_event(iface, IFEV_UPDATE);
                        return;
+               }
 
                interface_ip_set_enabled(&iface->config_ip, true);
                system_flush_routes();
@@ -528,15 +543,17 @@ void interface_set_proto_state(struct interface *iface, struct interface_proto_s
        state->iface = iface;
 }
 
-void
-interface_init(struct interface *iface, const char *name,
-              struct blob_attr *config)
+struct interface *
+interface_alloc(const char *name, struct blob_attr *config)
 {
+       struct interface *iface;
        struct blob_attr *tb[IFACE_ATTR_MAX];
        struct blob_attr *cur;
        const char *proto_name = NULL;
+       char *iface_name;
 
-       strncpy(iface->name, name, sizeof(iface->name) - 1);
+       iface = calloc_a(sizeof(*iface), &iface_name, strlen(name) + 1);
+       iface->name = strcpy(iface_name, name);
        INIT_LIST_HEAD(&iface->errors);
        INIT_LIST_HEAD(&iface->users);
        INIT_LIST_HEAD(&iface->hotplug_list);
@@ -587,19 +604,21 @@ interface_init(struct interface *iface, const char *name,
                        DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
        }
 
-       // Set a default exteranl routing table for IPv6 to do source-based-filtering
-       struct interface *iface_old = vlist_find(&interfaces, name, iface_old, node);
-       if (iface_old && iface_old->ip6table > 1000 && iface_old->ip6table < 2000)
-               iface->ip6table = iface_old->ip6table;
-       else
-               iface->ip6table = 1000 + ++interface_serial;
-
        if ((cur = tb[IFACE_ATTR_IP6TABLE])) {
                if (!system_resolve_rt_table(blobmsg_data(cur), &iface->ip6table))
                        DPRINTF("Failed to resolve routing table: %s\n", (char *) blobmsg_data(cur));
        }
 
+       iface->proto_ip.no_delegation = !blobmsg_get_bool_default(tb[IFACE_ATTR_DELEGATE], true);
+
        iface->config_autostart = iface->autostart;
+       return iface;
+}
+
+void interface_set_dynamic(struct interface *iface)
+{
+       iface->dynamic = true;
+       iface->node.version = -1; // Don't delete on reload
 }
 
 static bool __interface_add(struct interface *iface, struct blob_attr *config, bool alias)
@@ -675,6 +694,9 @@ interface_set_main_dev(struct interface *iface, struct device *dev)
                interface_set_l3_dev(iface, dev);
 
        device_add_user(&iface->main_dev, dev);
+       if (!dev)
+               return;
+
        if (claimed)
                device_claim(&iface->l3_dev);
 
@@ -724,6 +746,37 @@ interface_add_link(struct interface *iface, struct device *dev)
 }
 
 int
+interface_handle_link(struct interface *iface, const char *name, bool add)
+{
+       struct device *dev;
+       int ret;
+
+       device_lock();
+
+       dev = device_get(name, add ? 2 : 0);
+       if (!dev) {
+               ret = UBUS_STATUS_NOT_FOUND;
+               goto out;
+       }
+
+       if (add) {
+               device_set_present(dev, true);
+               if (iface->device_config)
+                       device_set_config(dev, &simple_device_type, iface->config);
+
+               system_if_apply_settings(dev, &dev->settings);
+               ret = interface_add_link(iface, dev);
+       } else {
+               ret = interface_remove_link(iface, dev);
+       }
+
+out:
+       device_unlock();
+
+       return ret;
+}
+
+int
 interface_set_up(struct interface *iface)
 {
        int ret;
@@ -793,6 +846,7 @@ set_config_state(struct interface *iface, enum interface_config_state s)
 void
 interface_update_start(struct interface *iface)
 {
+       iface->updated = 0;
        interface_ip_update_start(&iface->proto_ip);
 }
 
@@ -865,7 +919,7 @@ interface_change_config(struct interface *if_old, struct interface *if_new)
 #undef UPDATE
 
        if (reload) {
-               D(INTERFACE, "Reload interface '%s because of config changes\n",
+               D(INTERFACE, "Reload interface '%s' because of config changes\n",
                  if_old->name);
                interface_clear_errors(if_old);
                set_config_state(if_old, IFC_RELOAD);