add initial support for handling wireless devices via scripts

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

1 files changed, 863 insertions, 0 deletions

diff --git a/wireless.c b/wireless.c
new file mode 100644
index 0000000..52d0eae
--- /dev/null
+++ b/wireless.c
@@ -0,0 +1,863 @@
+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2013 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 <signal.h>
+#include "netifd.h"
+#include "wireless.h"
+#include "handler.h"
+#include "ubus.h"
+
+#define WIRELESS_SETUP_RETRY	3
+
+struct vlist_tree wireless_devices;
+struct avl_tree wireless_drivers;
+static struct blob_buf b;
+static int drv_fd;
+
+static const struct blobmsg_policy wdev_policy =
+	{ .name = "disabled", .type = BLOBMSG_TYPE_BOOL };
+
+static const struct uci_blob_param_list wdev_param = {
+	.n_params = 1,
+	.params = &wdev_policy,
+};
+
+enum {
+	VIF_ATTR_DISABLED,
+	VIF_ATTR_NETWORK,
+	__VIF_ATTR_MAX,
+};
+
+static const struct blobmsg_policy vif_policy[__VIF_ATTR_MAX] = {
+	[VIF_ATTR_DISABLED] = { .name = "disabled", .type = BLOBMSG_TYPE_BOOL },
+	[VIF_ATTR_NETWORK] = { .name = "network", .type = BLOBMSG_TYPE_STRING },
+};
+
+static const struct uci_blob_param_list vif_param = {
+	.n_params = ARRAY_SIZE(vif_policy),
+	.params = vif_policy,
+};
+
+static void
+put_container(struct blob_buf *buf, struct blob_attr *attr, const char *name)
+{
+	void *c = blobmsg_open_table(&b, name);
+	blob_put_raw(&b, blob_data(attr), blob_len(attr));
+	blobmsg_close_table(&b, c);
+}
+
+static void
+vif_config_add_bridge(struct blob_buf *buf, const char *network, bool prepare)
+{
+	struct interface *iface;
+	struct device *dev;
+
+	if (!network)
+		return;
+
+	iface = vlist_find(&interfaces, network, iface, node);
+	if (!iface)
+		return;
+
+	dev = iface->main_dev.dev;
+	if (!dev)
+		return;
+
+	if (dev->type != &bridge_device_type)
+		return;
+
+	blobmsg_add_string(buf, "bridge", dev->ifname);
+}
+
+static void
+prepare_config(struct wireless_device *wdev, struct blob_buf *buf, bool up)
+{
+	struct wireless_interface *vif;
+	void *l, *i;
+
+	blob_buf_init(&b, 0);
+	put_container(&b, wdev->config, "config");
+	if (wdev->data)
+		blobmsg_add_blob(&b, wdev->data);
+
+	l = blobmsg_open_table(&b, "interfaces");
+	vlist_for_each_element(&wdev->interfaces, vif, node) {
+		i = blobmsg_open_table(&b, vif->name);
+		vif_config_add_bridge(&b, vif->network, up);
+		put_container(&b, vif->config, "config");
+		if (vif->data)
+			blobmsg_add_blob(&b, vif->data);
+		blobmsg_close_table(&b, i);
+	}
+	blobmsg_close_table(&b, l);
+}
+
+static bool
+wireless_process_check(struct wireless_process *proc)
+{
+	return check_pid_path(proc->pid, proc->exe);
+}
+
+static void
+wireless_complete_kill_request(struct wireless_device *wdev)
+{
+	if (!wdev->kill_request)
+		return;
+
+	ubus_complete_deferred_request(ubus_ctx, wdev->kill_request, 0);
+	free(wdev->kill_request);
+	wdev->kill_request = NULL;
+}
+
+static void
+wireless_process_free(struct wireless_device *wdev, struct wireless_process *proc)
+{
+	list_del(&proc->list);
+	free(proc);
+
+	if (list_empty(&wdev->script_proc))
+		wireless_complete_kill_request(wdev);
+}
+
+static void
+wireless_close_script_proc_fd(struct wireless_device *wdev)
+{
+	if (wdev->script_proc_fd.fd < 0)
+		return;
+
+	uloop_fd_delete(&wdev->script_proc_fd);
+	close(wdev->script_proc_fd.fd);
+	wdev->script_proc_fd.fd = -1;
+}
+
+static void
+wireless_process_kill_all(struct wireless_device *wdev, int signal, bool free)
+{
+	struct wireless_process *proc, *tmp;
+
+	list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
+		bool check = wireless_process_check(proc);
+
+		if (check)
+			kill(proc->pid, signal);
+
+		if (free || !check)
+			wireless_process_free(wdev, proc);
+	}
+
+	if (free)
+		wireless_close_script_proc_fd(wdev);
+}
+
+static void
+wireless_device_free_state(struct wireless_device *wdev)
+{
+	struct wireless_interface *vif;
+
+	wireless_complete_kill_request(wdev);
+	free(wdev->data);
+	wdev->data = NULL;
+	vlist_for_each_element(&wdev->interfaces, vif, node) {
+		free(vif->data);
+		vif->data = NULL;
+		vif->ifname = NULL;
+	}
+}
+
+static void wireless_interface_handle_link(struct wireless_interface *vif, bool up)
+{
+	struct interface *iface;
+
+	if (!vif->network || !vif->ifname)
+		return;
+
+	iface = vlist_find(&interfaces, vif->network, iface, node);
+	if (!iface)
+		return;
+
+	interface_handle_link(iface, vif->ifname, up);
+}
+
+static void
+wireless_device_setup_cancel(struct wireless_device *wdev)
+{
+	if (wdev->cancel)
+		return;
+
+	wdev->cancel = true;
+	uloop_timeout_set(&wdev->timeout, 10 * 1000);
+}
+
+static void
+wireless_device_run_handler(struct wireless_device *wdev, bool up)
+{
+	const char *action = up ? "setup" : "teardown";
+	const char *argv[6];
+	char *config;
+	int i = 0;
+	int fds[2] = { -1, -1 };
+
+	prepare_config(wdev, &b, up);
+	config = blobmsg_format_json(b.head, true);
+
+	argv[i++] = wdev->drv->script;
+	argv[i++] = wdev->drv->name;
+	argv[i++] = action;
+	argv[i++] = wdev->name;
+	argv[i++] = config;
+	argv[i] = NULL;
+
+	if (up && pipe(fds) == 0) {
+		wdev->script_proc_fd.fd = fds[0];
+		uloop_fd_add(&wdev->script_proc_fd,
+			     ULOOP_READ | ULOOP_EDGE_TRIGGER);
+	}
+
+	netifd_start_process(argv, NULL, &wdev->script_task);
+
+	if (fds[1] >= 0)
+		close(fds[1]);
+
+	free(config);
+}
+
+static void
+__wireless_device_set_up(struct wireless_device *wdev)
+{
+	if (wdev->state != IFS_DOWN || config_init)
+		return;
+
+	wdev->state = IFS_SETUP;
+	wireless_device_run_handler(wdev, true);
+}
+
+static void
+wireless_device_mark_down(struct wireless_device *wdev)
+{
+	struct wireless_interface *vif;
+
+	vlist_for_each_element(&wdev->interfaces, vif, node)
+		wireless_interface_handle_link(vif, false);
+
+	wireless_process_kill_all(wdev, SIGTERM, true);
+
+	wdev->state = IFS_DOWN;
+	wireless_device_free_state(wdev);
+
+	if (wdev->autostart)
+		__wireless_device_set_up(wdev);
+}
+
+static void
+wireless_device_mark_up(struct wireless_device *wdev)
+{
+	struct wireless_interface *vif;
+
+	wdev->state = IFS_UP;
+	vlist_for_each_element(&wdev->interfaces, vif, node)
+		wireless_interface_handle_link(vif, true);
+}
+
+static void
+wireless_device_setup_timeout(struct uloop_timeout *timeout)
+{
+	struct wireless_device *wdev = container_of(timeout, struct wireless_device, timeout);
+
+	netifd_kill_process(&wdev->script_task);
+	wdev->script_task.cb(&wdev->script_task, -1);
+	wireless_device_mark_down(wdev);
+}
+
+void
+wireless_device_set_up(struct wireless_device *wdev)
+{
+	wdev->retry = WIRELESS_SETUP_RETRY;
+	wdev->autostart = true;
+	__wireless_device_set_up(wdev);
+}
+
+static void
+__wireless_device_set_down(struct wireless_device *wdev)
+{
+	if (wdev->state == IFS_TEARDOWN || wdev->state == IFS_DOWN)
+		return;
+
+	if (wdev->script_task.uloop.pending) {
+		wireless_device_setup_cancel(wdev);
+		return;
+	}
+
+	wdev->state = IFS_TEARDOWN;
+	wireless_device_run_handler(wdev, false);
+}
+
+static void
+wireless_device_retry_setup(struct wireless_device *wdev)
+{
+	if (--wdev->retry < 0)
+		wdev->autostart = false;
+
+	__wireless_device_set_down(wdev);
+}
+
+static void
+wireless_device_script_task_cb(struct netifd_process *proc, int ret)
+{
+	struct wireless_device *wdev = container_of(proc, struct wireless_device, script_task);
+
+	switch (wdev->state) {
+	case IFS_SETUP:
+		wireless_device_retry_setup(wdev);
+		break;
+	case IFS_TEARDOWN:
+		wireless_device_mark_down(wdev);
+		break;
+	default:
+		break;
+	}
+}
+
+void
+wireless_device_set_down(struct wireless_device *wdev)
+{
+	wdev->autostart = false;
+	__wireless_device_set_down(wdev);
+}
+
+static void
+wireless_device_free(struct wireless_device *wdev)
+{
+    vlist_flush_all(&wdev->interfaces);
+    free(wdev->config);
+    free(wdev);
+}
+
+static void
+wdev_handle_config_change(struct wireless_device *wdev)
+{
+	switch(wdev->config_state) {
+	case IFC_NORMAL:
+		break;
+	case IFC_RELOAD:
+		if (wdev->autostart)
+			__wireless_device_set_up(wdev);
+		break;
+	case IFC_REMOVE:
+		wireless_device_free(wdev);
+		break;
+	}
+}
+
+static void
+wdev_set_config_state(struct wireless_device *wdev, enum interface_config_state s)
+{
+	enum interface_config_state old_state = wdev->config_state;
+
+	wdev->config_state = s;
+	if (old_state != IFC_NORMAL)
+		return;
+
+	if (wdev->state == IFS_DOWN)
+		wdev_handle_config_change(wdev);
+	else
+		__wireless_device_set_down(wdev);
+}
+
+static void
+wdev_change_config(struct wireless_device *wdev, struct wireless_device *wd_new)
+{
+	struct blob_attr *new_config = wd_new->config;
+
+	free(wd_new);
+
+	if (blob_attr_equal(wdev->config, new_config))
+		return;
+
+	D(WIRELESS, "Update configuration of wireless device '%s'\n", wdev->name);
+	free(wdev->config);
+	wdev->config = blob_memdup(new_config);
+	wdev_set_config_state(wdev, IFC_RELOAD);
+}
+
+static void
+wdev_create(struct wireless_device *wdev)
+{
+	wdev->retry = WIRELESS_SETUP_RETRY;
+	wdev->config = blob_memdup(wdev->config);
+}
+
+static void
+wdev_update(struct vlist_tree *tree, struct vlist_node *node_new,
+	    struct vlist_node *node_old)
+{
+	struct wireless_device *wd_old = container_of(node_old, struct wireless_device, node);
+	struct wireless_device *wd_new = container_of(node_new, struct wireless_device, node);
+
+	if (wd_old && wd_new) {
+		wdev_change_config(wd_old, wd_new);
+	} else if (wd_old) {
+		D(WIRELESS, "Delete wireless device '%s'\n", wd_old->name);
+		wdev_set_config_state(wd_old, IFC_REMOVE);
+	} else if (wd_new) {
+		D(WIRELESS, "Create wireless device '%s'\n", wd_new->name);
+		wdev_create(wd_new);
+	}
+}
+
+static void
+wireless_add_handler(const char *script, const char *name, json_object *obj)
+{
+	struct wireless_driver *drv;
+	char *name_str, *script_str;
+	json_object *dev_config_obj, *iface_config_obj;
+	struct uci_blob_param_list *dev_config, *iface_config;
+
+	dev_config_obj = json_get_field(obj, "device", json_type_array);
+	iface_config_obj = json_get_field(obj, "iface", json_type_array);
+
+	if (!dev_config_obj || !iface_config_obj)
+		return;
+
+	drv = calloc_a(sizeof(*drv),
+		&name_str, strlen(name) + 1,
+		&script_str, strlen(script) + 1,
+		&dev_config, sizeof(*dev_config) + sizeof(void *),
+		&iface_config, sizeof(*iface_config) + sizeof(void *));
+
+	drv->name = strcpy(name_str, name);
+	drv->script = strcpy(script_str, script);
+
+	dev_config->n_next = 1;
+	dev_config->next[0] = &wdev_param;
+	drv->device.config = dev_config;
+
+	iface_config->n_next = 1;
+	iface_config->next[0] = &vif_param;
+	drv->interface.config = iface_config;
+
+	drv->device.buf = netifd_handler_parse_config(drv->device.config, dev_config_obj);
+	drv->interface.buf = netifd_handler_parse_config(drv->interface.config, iface_config_obj);
+
+	drv->node.key = drv->name;
+	avl_insert(&wireless_drivers, &drv->node);
+	D(WIRELESS, "Add handler for script %s: %s\n", script, name);
+}
+
+static void __init
+wireless_init_list(void)
+{
+	vlist_init(&wireless_devices, avl_strcmp, wdev_update);
+	wireless_devices.keep_old = true;
+	wireless_devices.no_delete = true;
+
+	avl_init(&wireless_drivers, avl_strcmp, false, NULL);
+	drv_fd = netifd_open_subdir("wireless");
+	if (drv_fd < 0)
+		return;
+
+	netifd_init_script_handlers(drv_fd, wireless_add_handler);
+}
+
+static void
+wireless_interface_init_config(struct wireless_interface *vif)
+{
+	struct blob_attr *tb[__VIF_ATTR_MAX];
+	struct blob_attr *cur;
+
+	vif->network = NULL;
+	blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(vif->config), blob_len(vif->config));
+
+	if ((cur = tb[VIF_ATTR_NETWORK]))
+		vif->network = blobmsg_data(cur);
+}
+
+static void
+vif_update(struct vlist_tree *tree, struct vlist_node *node_new,
+	   struct vlist_node *node_old)
+{
+	struct wireless_interface *vif_old = container_of(node_old, struct wireless_interface, node);
+	struct wireless_interface *vif_new = container_of(node_new, struct wireless_interface, node);
+	struct wireless_device *wdev;
+
+	if (vif_old)
+		wdev = vif_old->wdev;
+	else
+		wdev = vif_new->wdev;
+
+	if (vif_old && vif_new) {
+		if (blob_attr_equal(vif_old->config, vif_new->config)) {
+			free(vif_new);
+			return;
+		}
+
+		D(WIRELESS, "Update wireless interface %s on device %s\n", vif_new->name, wdev->name);
+		free(vif_old->config);
+		vif_old->config = blob_memdup(vif_new->config);
+		wireless_interface_init_config(vif_old);
+		free(vif_new);
+	} else if (vif_new) {
+		D(WIRELESS, "Create new wireless interface %s on device %s\n", vif_new->name, wdev->name);
+		vif_new->config = blob_memdup(vif_new->config);
+		wireless_interface_init_config(vif_new);
+	} else if (vif_old) {
+		D(WIRELESS, "Delete wireless interface %s on device %s\n", vif_old->name, wdev->name);
+		free(vif_old->config);
+		free(vif_old);
+	}
+
+	wdev_set_config_state(wdev, IFC_RELOAD);
+}
+
+static void
+wireless_proc_poll_fd(struct uloop_fd *fd, unsigned int events)
+{
+	struct wireless_device *wdev = container_of(fd, struct wireless_device, script_proc_fd);
+	char buf[128];
+
+	while (1) {
+		int b = read(fd->fd, buf, sizeof(buf));
+		if (b < 0) {
+			if (errno == EINTR)
+				continue;
+
+			if (errno == EAGAIN)
+				return;
+
+			goto done;
+		}
+
+		if (!b)
+			goto done;
+	}
+
+done:
+	uloop_timeout_set(&wdev->script_check, 0);
+	wireless_close_script_proc_fd(wdev);
+}
+
+static void
+wireless_device_check_script_tasks(struct uloop_timeout *timeout)
+{
+	struct wireless_device *wdev = container_of(timeout, struct wireless_device, script_check);
+	struct wireless_process *proc, *tmp;
+	bool restart = false;
+
+	list_for_each_entry_safe(proc, tmp, &wdev->script_proc, list) {
+		if (wireless_process_check(proc))
+			continue;
+
+		if (proc->required)
+			restart = true;
+
+		wireless_process_free(wdev, proc);
+	}
+
+	if (restart)
+		wireless_device_retry_setup(wdev);
+	else
+		uloop_timeout_set(&wdev->script_check, 1000);
+}
+
+void
+wireless_device_create(struct wireless_driver *drv, const char *name, struct blob_attr *data)
+{
+	struct wireless_device *wdev;
+	char *name_buf;
+	struct blob_attr *disabled;
+
+	blobmsg_parse(&wdev_policy, 1, &disabled, blob_data(data), blob_len(data));
+	if (disabled && blobmsg_get_bool(disabled))
+		return;
+
+	wdev = calloc_a(sizeof(*wdev), &name_buf, strlen(name) + 1);
+	wdev->drv = drv;
+	wdev->state = IFS_DOWN;
+	wdev->config_state = IFC_NORMAL;
+	wdev->name = strcpy(name_buf, name);
+	wdev->config = data;
+	wdev->config_autostart = true;
+	wdev->autostart = wdev->config_autostart;
+	INIT_LIST_HEAD(&wdev->script_proc);
+	vlist_init(&wdev->interfaces, avl_strcmp, vif_update);
+	wdev->interfaces.keep_old = true;
+	wdev->interfaces.no_delete = true;
+	vlist_add(&wireless_devices, &wdev->node, wdev->name);
+
+	wdev->timeout.cb = wireless_device_setup_timeout;
+	wdev->script_task.cb = wireless_device_script_task_cb;
+	wdev->script_task.dir_fd = drv_fd;
+	wdev->script_task.log_prefix = wdev->name;
+
+	wdev->script_proc_fd.fd = -1;
+	wdev->script_proc_fd.cb = wireless_proc_poll_fd;
+
+	wdev->script_check.cb = wireless_device_check_script_tasks;
+}
+
+void wireless_interface_create(struct wireless_device *wdev, struct blob_attr *data)
+{
+	struct wireless_interface *vif;
+	struct blob_attr *tb[__VIF_ATTR_MAX];
+	struct blob_attr *cur;
+	char *name_buf;
+	char name[8];
+
+	blobmsg_parse(vif_policy, __VIF_ATTR_MAX, tb, blob_data(data), blob_len(data));
+
+	cur = tb[VIF_ATTR_DISABLED];
+	if (cur && blobmsg_get_bool(cur))
+		return;
+
+	sprintf(name, "%d", wdev->vif_idx++);
+
+	vif = calloc_a(sizeof(*vif), &name_buf, strlen(name) + 1);
+	vif->name = strcpy(name_buf, name);
+	vif->wdev = wdev;
+	vif->config = data;
+	vlist_add(&wdev->interfaces, &vif->node, vif->name);
+}
+
+static void
+wireless_interface_status(struct wireless_interface *iface, struct blob_buf *b)
+{
+	void *i;
+
+	i = blobmsg_open_table(b, iface->name);
+	if (iface->data)
+		blob_put_raw(b, blob_data(iface->data), blob_len(iface->data));
+	blobmsg_close_table(b, i);
+}
+
+void
+wireless_device_status(struct wireless_device *wdev, struct blob_buf *b)
+{
+	struct wireless_interface *iface;
+	void *c, *i;
+
+	c = blobmsg_open_table(b, wdev->name);
+	blobmsg_add_u8(b, "up", wdev->state == IFS_UP);
+	blobmsg_add_u8(b, "pending", wdev->state == IFS_SETUP || wdev->state == IFS_TEARDOWN);
+	blobmsg_add_u8(b, "autostart", wdev->autostart);
+	i = blobmsg_open_table(b, "interfaces");
+	vlist_for_each_element(&wdev->interfaces, iface, node)
+		wireless_interface_status(iface, b);
+	blobmsg_close_table(b, i);
+	blobmsg_close_table(b, c);
+}
+
+static void
+wireless_interface_set_data(struct wireless_interface *vif)
+{
+	enum {
+		VIF_DATA_IFNAME,
+		__VIF_DATA_MAX,
+	};
+	static const struct blobmsg_policy data_policy[__VIF_DATA_MAX] = {
+		[VIF_DATA_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
+	};
+	struct blob_attr *tb[__VIF_DATA_MAX];
+	struct blob_attr *cur;
+
+	blobmsg_parse(data_policy, __VIF_DATA_MAX, tb,
+		      blobmsg_data(vif->data), blobmsg_data_len(vif->data));
+
+	if ((cur = tb[VIF_DATA_IFNAME]))
+		vif->ifname = blobmsg_data(cur);
+}
+
+static int
+wireless_device_add_process(struct wireless_device *wdev, struct blob_attr *data)
+{
+	enum {
+		PROC_ATTR_PID,
+		PROC_ATTR_EXE,
+		PROC_ATTR_REQUIRED,
+		__PROC_ATTR_MAX
+	};
+	static const struct blobmsg_policy proc_policy[__PROC_ATTR_MAX] = {
+		[PROC_ATTR_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
+		[PROC_ATTR_EXE] = { .name = "exe", .type = BLOBMSG_TYPE_STRING },
+		[PROC_ATTR_REQUIRED] = { .name = "required", .type = BLOBMSG_TYPE_BOOL },
+	};
+	struct blob_attr *tb[__PROC_ATTR_MAX];
+	struct wireless_process *proc;
+	char *name;
+
+	if (!data)
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	blobmsg_parse(proc_policy, __PROC_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
+	if (!tb[PROC_ATTR_PID] || !tb[PROC_ATTR_EXE])
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	proc = calloc_a(sizeof(*proc),
+		&name, strlen(blobmsg_data(tb[PROC_ATTR_EXE])) + 1);
+
+	proc->pid = blobmsg_get_u32(tb[PROC_ATTR_PID]);
+	proc->exe = strcpy(name, blobmsg_data(tb[PROC_ATTR_EXE]));
+
+	if (tb[PROC_ATTR_REQUIRED])
+		proc->required = blobmsg_get_bool(tb[PROC_ATTR_REQUIRED]);
+
+	list_add(&proc->list, &wdev->script_proc);
+	uloop_timeout_set(&wdev->script_check, 0);
+
+	return 0;
+}
+
+static int
+wireless_device_process_kill_all(struct wireless_device *wdev, struct blob_attr *data,
+				 struct ubus_request_data *req)
+{
+	enum {
+		KILL_ATTR_SIGNAL,
+		KILL_ATTR_IMMEDIATE,
+		__KILL_ATTR_MAX
+	};
+	static const struct blobmsg_policy kill_policy[__KILL_ATTR_MAX] = {
+		[KILL_ATTR_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
+		[KILL_ATTR_IMMEDIATE] = { .name = "immediate", .type = BLOBMSG_TYPE_BOOL },
+	};
+	struct blob_attr *tb[__KILL_ATTR_MAX];
+	struct blob_attr *cur;
+	bool immediate = false;
+	int signal = SIGTERM;
+
+	blobmsg_parse(kill_policy, __KILL_ATTR_MAX, tb, blobmsg_data(data), blobmsg_data_len(data));
+
+	if ((cur = tb[KILL_ATTR_SIGNAL]))
+		signal = blobmsg_get_u32(cur);
+
+	if ((cur = tb[KILL_ATTR_IMMEDIATE]))
+		immediate = blobmsg_get_u32(cur);
+
+	if (wdev->state != IFS_TEARDOWN || wdev->kill_request)
+		return UBUS_STATUS_PERMISSION_DENIED;
+
+	wireless_process_kill_all(wdev, signal, immediate);
+
+	if (list_empty(&wdev->script_proc))
+		return 0;
+
+	wdev->kill_request = calloc(1, sizeof(*wdev->kill_request));
+	ubus_defer_request(ubus_ctx, req, wdev->kill_request);
+
+	return 0;
+}
+
+static int
+wireless_device_set_retry(struct wireless_device *wdev, struct blob_attr *data)
+{
+	static const struct blobmsg_policy retry_policy = {
+		.name = "retry", .type = BLOBMSG_TYPE_INT32
+	};
+	struct blob_attr *val;
+
+	blobmsg_parse(&retry_policy, 1, &val, blobmsg_data(data), blobmsg_data_len(data));
+	if (!val)
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	wdev->retry = blobmsg_get_u32(val);
+	return 0;
+}
+
+enum {
+	NOTIFY_CMD_UP = 0,
+	NOTIFY_CMD_SET_DATA = 1,
+	NOTIFY_CMD_PROCESS_ADD = 2,
+	NOTIFY_CMD_PROCESS_KILL_ALL = 3,
+	NOTIFY_CMD_SET_RETRY = 4,
+};
+
+int
+wireless_device_notify(struct wireless_device *wdev, struct blob_attr *data,
+		       struct ubus_request_data *req)
+{
+	enum {
+		NOTIFY_ATTR_COMMAND,
+		NOTIFY_ATTR_VIF,
+		NOTIFY_ATTR_DATA,
+		__NOTIFY_MAX,
+	};
+	static const struct blobmsg_policy notify_policy[__NOTIFY_MAX] = {
+		[NOTIFY_ATTR_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_INT32 },
+		[NOTIFY_ATTR_VIF] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
+		[NOTIFY_ATTR_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
+	};
+	struct wireless_interface *vif = NULL;
+	struct blob_attr *tb[__NOTIFY_MAX];
+	struct blob_attr *cur, **pdata;
+
+	blobmsg_parse(notify_policy, __NOTIFY_MAX, tb, blob_data(data), blob_len(data));
+
+	if (!tb[NOTIFY_ATTR_COMMAND])
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	if ((cur = tb[NOTIFY_ATTR_VIF]) != NULL) {
+		vif = vlist_find(&wdev->interfaces, blobmsg_data(cur), vif, node);
+		if (!vif)
+			return UBUS_STATUS_NOT_FOUND;
+	}
+
+	cur = tb[NOTIFY_ATTR_DATA];
+	if (!cur)
+		return UBUS_STATUS_INVALID_ARGUMENT;
+
+	switch (blobmsg_get_u32(tb[NOTIFY_ATTR_COMMAND])) {
+	case NOTIFY_CMD_UP:
+		if (vif)
+			return UBUS_STATUS_INVALID_ARGUMENT;
+
+		if (wdev->state != IFS_SETUP)
+			return UBUS_STATUS_PERMISSION_DENIED;
+
+		if (wdev->cancel)
+			return 0;
+
+		wireless_device_mark_up(wdev);
+		break;
+	case NOTIFY_CMD_SET_DATA:
+		if (vif)
+			pdata = &vif->data;
+		else
+			pdata = &wdev->data;
+
+		if (*pdata)
+			return UBUS_STATUS_INVALID_ARGUMENT;
+
+		*pdata = blob_memdup(cur);
+		if (vif)
+			wireless_interface_set_data(vif);
+		break;
+	case NOTIFY_CMD_PROCESS_ADD:
+		return wireless_device_add_process(wdev, cur);
+	case NOTIFY_CMD_PROCESS_KILL_ALL:
+		return wireless_device_process_kill_all(wdev, cur, req);
+	case NOTIFY_CMD_SET_RETRY:
+		return wireless_device_set_retry(wdev, cur);
+	default:
+		return UBUS_STATUS_INVALID_ARGUMENT;
+	}
+
+	return 0;
+}
+
+void
+wireless_start_pending(void)
+{
+	struct wireless_device *wdev;
+
+	vlist_for_each_element(&wireless_devices, wdev, node)
+		if (wdev->autostart)
+			__wireless_device_set_up(wdev);
+}