X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fnetifd.git;a=blobdiff_plain;f=interface.c;h=6cad26bee0f3a1baf2e34fedfc66b1e1a4a1fa4d;hp=04834ec022c78d71f4a15c846029cfdc588dd35d;hb=e7ac4074bf497cd19e38adbb49e2b3eb275eeb05;hpb=a4e6adc43fe206eada9dfe5b99a6cc6ac451d702

diff --git a/interface.c b/interface.c
index 04834ec..6cad26b 100644
--- a/interface.c
+++ b/interface.c
@@ -1,3 +1,16 @@
+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -12,11 +25,17 @@
 #include "system.h"
 
 struct vlist_tree interfaces;
+static LIST_HEAD(iface_all_users);
 
 enum {
 	IFACE_ATTR_IFNAME,
 	IFACE_ATTR_PROTO,
 	IFACE_ATTR_AUTO,
+	IFACE_ATTR_DEFAULTROUTE,
+	IFACE_ATTR_PEERDNS,
+	IFACE_ATTR_DNS,
+	IFACE_ATTR_DNS_SEARCH,
+	IFACE_ATTR_METRIC,
 	IFACE_ATTR_MAX
 };
 
@@ -24,11 +43,21 @@ static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
 	[IFACE_ATTR_PROTO] = { .name = "proto", .type = BLOBMSG_TYPE_STRING },
 	[IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
 	[IFACE_ATTR_AUTO] = { .name = "auto", .type = BLOBMSG_TYPE_BOOL },
+	[IFACE_ATTR_DEFAULTROUTE] = { .name = "defaultroute", .type = BLOBMSG_TYPE_BOOL },
+	[IFACE_ATTR_PEERDNS] = { .name = "peerdns", .type = BLOBMSG_TYPE_BOOL },
+	[IFACE_ATTR_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
+	[IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
+	[IFACE_ATTR_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
+};
+
+static const union config_param_info iface_attr_info[IFACE_ATTR_MAX] = {
+	[IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
 };
 
 const struct config_param_list interface_attr_list = {
 	.n_params = IFACE_ATTR_MAX,
 	.params = iface_attrs,
+	.info = iface_attr_info,
 };
 
 static void
@@ -77,30 +106,72 @@ void interface_add_error(struct interface *iface, const char *subsystem,
 }
 
 static void
+interface_data_del(struct interface *iface, struct interface_data *data)
+{
+	avl_delete(&iface->data, &data->node);
+	free(data);
+}
+
+static void
+interface_data_flush(struct interface *iface)
+{
+	struct interface_data *d, *tmp;
+
+	avl_for_each_element_safe(&iface->data, d, node, tmp)
+		interface_data_del(iface, d);
+}
+
+int
+interface_add_data(struct interface *iface, const struct blob_attr *data)
+{
+	struct interface_data *n, *o;
+
+	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);
+
+	o = avl_find_element(&iface->data, n->node.key, o, node);
+	if (o)
+		interface_data_del(iface, o);
+
+	avl_insert(&iface->data, &n->node);
+	return 0;
+}
+
+static void
 interface_event(struct interface *iface, enum interface_event ev)
 {
 	struct interface_user *dep, *tmp;
 
 	list_for_each_entry_safe(dep, tmp, &iface->users, list)
-		dep->cb(dep, IFEV_UP);
+		dep->cb(dep, iface, ev);
 
-	interface_queue_event(iface, ev);
+	list_for_each_entry_safe(dep, tmp, &iface_all_users, list)
+		dep->cb(dep, iface, ev);
 }
 
 static void
 interface_flush_state(struct interface *iface)
 {
-	interface_ip_flush(&iface->proto_ip);
 	if (iface->main_dev.dev)
 		device_release(&iface->main_dev);
-	if (iface->l3_dev != &iface->main_dev && iface->l3_dev->dev)
-		device_release(iface->l3_dev);
+	if (iface->l3_dev.dev)
+		device_release(&iface->l3_dev);
+	interface_data_flush(iface);
 }
 
 static void
 mark_interface_down(struct interface *iface)
 {
+	if (iface->state == IFS_UP)
+		interface_event(iface, IFEV_DOWN);
+	interface_ip_set_enabled(&iface->config_ip, false);
+	interface_ip_flush(&iface->proto_ip);
 	interface_flush_state(iface);
+	system_flush_routes();
 	iface->state = IFS_DOWN;
 }
 
@@ -113,8 +184,9 @@ __interface_set_down(struct interface *iface, bool force)
 		iface->state == IFS_TEARDOWN)
 		return;
 
+	if (iface->state == IFS_UP)
+		interface_event(iface, IFEV_DOWN);
 	iface->state = IFS_TEARDOWN;
-	interface_event(iface, IFEV_DOWN);
 	interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, force);
 	if (force)
 		interface_flush_state(iface);
@@ -160,10 +232,15 @@ interface_set_available(struct interface *iface, bool new_state)
 void
 interface_add_user(struct interface_user *dep, struct interface *iface)
 {
+	if (!iface) {
+		list_add(&dep->list, &iface_all_users);
+		return;
+	}
+
 	dep->iface = iface;
 	list_add(&dep->list, &iface->users);
 	if (iface->state == IFS_UP)
-		dep->cb(dep, IFEV_UP);
+		dep->cb(dep, iface, IFEV_UP);
 }
 
 void
@@ -178,17 +255,19 @@ interface_claim_device(struct interface *iface)
 {
 	struct device *dev;
 
-	if (iface->ifname && iface->proto_handler &&
+	if (iface->ifname &&
 		!(iface->proto_handler->flags & PROTO_FLAG_NODEV)) {
 		dev = device_get(iface->ifname, true);
 		if (dev)
-			device_add_user(&iface->main_dev, dev);
+			interface_set_main_dev(iface, dev);
 	}
+	if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
+		interface_set_available(iface, true);
 }
 
 
 static void
-interface_cleanup(struct interface *iface)
+interface_cleanup(struct interface *iface, bool reload)
 {
 	struct interface_user *dep, *tmp;
 
@@ -198,16 +277,17 @@ interface_cleanup(struct interface *iface)
 	interface_ip_flush(&iface->config_ip);
 	interface_flush_state(iface);
 	interface_clear_errors(iface);
-	if (iface->main_dev.dev)
-		device_remove_user(&iface->main_dev);
-	iface->l3_dev = &iface->main_dev;
+	if (iface->main_dev.dev &&
+	    (!reload || !iface->main_dev.hotplug))
+		interface_set_main_dev(iface, NULL);
 	interface_set_proto_state(iface, NULL);
 }
 
 static void
 interface_do_free(struct interface *iface)
 {
-	interface_cleanup(iface);
+	interface_event(iface, IFEV_FREE);
+	interface_cleanup(iface, false);
 	free(iface->config);
 	netifd_ubus_remove_interface(iface);
 	avl_delete(&interfaces.avl, &iface->node.avl);
@@ -217,10 +297,10 @@ interface_do_free(struct interface *iface)
 static void
 interface_do_reload(struct interface *iface)
 {
-	interface_cleanup(iface);
-
-	interface_claim_device(iface);
+	interface_event(iface, IFEV_RELOAD);
+	interface_cleanup(iface, true);
 	proto_init_interface(iface, iface->config);
+	interface_claim_device(iface);
 }
 
 static void
@@ -263,8 +343,6 @@ interface_proto_cb(struct interface_proto_state *state, enum interface_proto_eve
 			return;
 
 		netifd_log_message(L_NOTICE, "Interface '%s' is now down\n", iface->name);
-		interface_ip_set_enabled(&iface->config_ip, false);
-		system_flush_routes();
 		mark_interface_down(iface);
 		interface_handle_config_change(iface);
 		break;
@@ -273,8 +351,8 @@ interface_proto_cb(struct interface_proto_state *state, enum interface_proto_eve
 			return;
 
 		netifd_log_message(L_NOTICE, "Interface '%s' has lost the connection\n", iface->name);
+		mark_interface_down(iface);
 		iface->state = IFS_SETUP;
-		interface_event(iface, IFEV_DOWN);
 		break;
 	}
 }
@@ -306,12 +384,11 @@ interface_init(struct interface *iface, const char *name,
 	INIT_LIST_HEAD(&iface->errors);
 	INIT_LIST_HEAD(&iface->users);
 	INIT_LIST_HEAD(&iface->hotplug_list);
-	interface_ip_init(&iface->proto_ip, iface);
-	interface_ip_init(&iface->config_ip, iface);
+	interface_ip_init(iface);
+	avl_init(&iface->data, avl_strcmp, false, NULL);
 	iface->config_ip.enabled = false;
 
 	iface->main_dev.cb = interface_cb;
-	iface->l3_dev = &iface->main_dev;
 
 	blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
 		      blob_data(config), blob_len(config));
@@ -321,10 +398,21 @@ interface_init(struct interface *iface, const char *name,
 
 	proto_attach_interface(iface, proto_name);
 
-	if ((cur = tb[IFACE_ATTR_AUTO]))
-		iface->autostart = blobmsg_get_bool(cur);
-	else
-		iface->autostart = true;
+	iface->autostart = blobmsg_get_bool_default(tb[IFACE_ATTR_AUTO], true);
+	iface->proto_ip.no_defaultroute =
+		!blobmsg_get_bool_default(tb[IFACE_ATTR_DEFAULTROUTE], true);
+	iface->proto_ip.no_dns =
+		!blobmsg_get_bool_default(tb[IFACE_ATTR_PEERDNS], true);
+
+	if ((cur = tb[IFACE_ATTR_DNS]))
+		interface_add_dns_server_list(&iface->config_ip, cur);
+
+	if ((cur = tb[IFACE_ATTR_DNS_SEARCH]))
+		interface_add_dns_search_list(&iface->config_ip, cur);
+
+	if ((cur = tb[IFACE_ATTR_METRIC]))
+		iface->metric = blobmsg_get_u32(cur);
+
 	iface->config_autostart = iface->autostart;
 }
 
@@ -341,20 +429,65 @@ interface_add(struct interface *iface, struct blob_attr *config)
 		iface->ifname = blobmsg_data(cur);
 
 	iface->config = config;
-	vlist_add(&interfaces, &iface->node);
+	vlist_add(&interfaces, &iface->node, iface->name);
 }
 
 void
-interface_remove_link(struct interface *iface, struct device *dev)
+interface_set_l3_dev(struct interface *iface, struct device *dev)
 {
-	struct device *mdev = iface->main_dev.dev;
+	bool enabled = iface->config_ip.enabled;
+	bool claimed = iface->l3_dev.claimed;
 
-	if (mdev && mdev->hotplug_ops) {
-		mdev->hotplug_ops->del(mdev, dev);
+	if (iface->l3_dev.dev == dev)
 		return;
+
+	interface_ip_set_enabled(&iface->config_ip, false);
+	interface_ip_flush(&iface->proto_ip);
+	device_add_user(&iface->l3_dev, dev);
+
+	if (dev) {
+		if (claimed)
+			device_claim(&iface->l3_dev);
+		interface_ip_set_enabled(&iface->config_ip, enabled);
 	}
+}
+
+void
+interface_set_main_dev(struct interface *iface, struct device *dev)
+{
+	bool set_l3 = (iface->main_dev.dev == iface->l3_dev.dev);
+	bool claimed = iface->l3_dev.claimed;
+
+	if (iface->main_dev.dev == dev)
+		return;
+
+	if (set_l3)
+		interface_set_l3_dev(iface, dev);
+
+	device_add_user(&iface->main_dev, dev);
+	if (claimed)
+		device_claim(&iface->l3_dev);
+
+	if (!iface->l3_dev.dev)
+		interface_set_l3_dev(iface, dev);
+}
+
+int
+interface_remove_link(struct interface *iface, struct device *dev)
+{
+	struct device *mdev = iface->main_dev.dev;
+
+	if (mdev && mdev->hotplug_ops)
+		return mdev->hotplug_ops->del(mdev, dev);
+
+	if (!iface->main_dev.hotplug)
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	if (dev != iface->main_dev.dev)
+		return UBUS_STATUS_INVALID_ARGUMENT;
 
 	device_remove_user(&iface->main_dev);
+	return 0;
 }
 
 int
@@ -362,14 +495,21 @@ interface_add_link(struct interface *iface, struct device *dev)
 {
 	struct device *mdev = iface->main_dev.dev;
 
-	if (mdev && mdev->hotplug_ops)
-		return mdev->hotplug_ops->add(mdev, dev);
+	if (mdev == dev)
+		return 0;
 
-	if (iface->main_dev.dev)
-		interface_remove_link(iface, NULL);
+	if (iface->main_dev.hotplug)
+		device_remove_user(&iface->main_dev);
 
-	device_add_user(&iface->main_dev, dev);
+	if (mdev) {
+		if (mdev->hotplug_ops)
+			return mdev->hotplug_ops->add(mdev, dev);
+		else
+			return UBUS_STATUS_NOT_SUPPORTED;
+	}
 
+	interface_set_main_dev(iface, dev);
+	iface->main_dev.hotplug = true;
 	return 0;
 }
 
@@ -449,15 +589,14 @@ interface_update_start(struct interface *iface)
 void
 interface_update_complete(struct interface *iface)
 {
-	struct device_route *route;
-
 	interface_ip_update_complete(&iface->proto_ip);
-	vlist_for_each_element(&iface->config_ip.route, route, node) {
-		if (iface->l3_dev->dev) {
-			system_add_route(iface->l3_dev->dev, route);
-			route->enabled = true;
-		}
-	}
+}
+
+static void
+interface_replace_dns(struct interface_ip_settings *new, struct interface_ip_settings *old)
+{
+	vlist_simple_replace(&new->dns_servers, &old->dns_servers);
+	vlist_simple_replace(&new->dns_search, &old->dns_search);
 }
 
 static void
@@ -476,8 +615,9 @@ interface_change_config(struct interface *if_old, struct interface *if_new)
 	if_old->ifname = if_new->ifname;
 	if_old->proto_handler = if_new->proto_handler;
 
-	if (strcmp(old_ifname, if_new->ifname) != 0 ||
-		proto != if_new->proto_handler) {
+	if ((!!old_ifname != !!if_new->ifname) ||
+	    (old_ifname && strcmp(old_ifname, if_new->ifname) != 0) ||
+	    proto != if_new->proto_handler) {
 		D(INTERFACE, "Reload interface '%s' because of ifname/proto change\n",
 		  if_old->name);
 		goto reload;
@@ -493,6 +633,25 @@ interface_change_config(struct interface *if_old, struct interface *if_new)
 		goto reload;
 	}
 
+#define UPDATE(field) ({						\
+		bool __changed = (if_old->field != if_new->field);	\
+		if_old->field = if_new->field;				\
+		__changed;						\
+	})
+
+	if (UPDATE(metric) || UPDATE(proto_ip.no_defaultroute)) {
+		interface_ip_set_enabled(&if_old->config_ip, false);
+		interface_ip_set_enabled(&if_old->config_ip, if_new->config_ip.enabled);
+		interface_ip_set_enabled(&if_old->proto_ip, false);
+		interface_ip_set_enabled(&if_old->proto_ip, if_new->proto_ip.enabled);
+	}
+
+	UPDATE(proto_ip.no_dns);
+	interface_replace_dns(&if_old->config_ip, &if_new->config_ip);
+	interface_write_resolv_conf();
+
+#undef UPDATE
+
 	goto out;
 
 reload:
@@ -517,8 +676,8 @@ interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
 		set_config_state(if_old, IFC_REMOVE);
 	} else if (node_new) {
 		D(INTERFACE, "Create interface '%s'\n", if_new->name);
-		interface_claim_device(if_new);
 		proto_init_interface(if_new, if_new->config);
+		interface_claim_device(if_new);
 		netifd_ubus_add_interface(if_new);
 	}
 }
@@ -527,8 +686,7 @@ interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
 static void __init
 interface_init_list(void)
 {
-	vlist_init(&interfaces, avl_strcmp, interface_update,
-		   struct interface, node, name);
+	vlist_init(&interfaces, avl_strcmp, interface_update);
 	interfaces.keep_old = true;
 	interfaces.no_delete = true;
 }