[project/netifd.git] / ubus.c

/*
 * 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.
 */
#define _GNU_SOURCE

#include <arpa/inet.h>
#include <string.h>
#include <stdio.h>

#include "netifd.h"
#include "interface.h"
#include "proto.h"
#include "ubus.h"
#include "system.h"
#include "wireless.h"

struct ubus_context *ubus_ctx = NULL;
static struct blob_buf b;
static const char *ubus_path;

/* global object */

static int
netifd_handle_restart(struct ubus_context *ctx, struct ubus_object *obj,
                      struct ubus_request_data *req, const char *method,
                      struct blob_attr *msg)
{
        netifd_restart();
        return 0;
}

static int
netifd_handle_reload(struct ubus_context *ctx, struct ubus_object *obj,
                     struct ubus_request_data *req, const char *method,
                     struct blob_attr *msg)
{
        netifd_reload();
        return 0;
}

enum {
        HR_TARGET,
        HR_V6,
        HR_INTERFACE,
        __HR_MAX
};

static const struct blobmsg_policy route_policy[__HR_MAX] = {
        [HR_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
        [HR_V6] = { .name = "v6", .type = BLOBMSG_TYPE_BOOL },
        [HR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
};

static int
netifd_add_host_route(struct ubus_context *ctx, struct ubus_object *obj,
                      struct ubus_request_data *req, const char *method,
                      struct blob_attr *msg)
{
        struct blob_attr *tb[__HR_MAX];
        struct interface *iface = NULL;
        union if_addr a;
        bool v6 = false;

        blobmsg_parse(route_policy, __HR_MAX, tb, blob_data(msg), blob_len(msg));
        if (!tb[HR_TARGET])
                return UBUS_STATUS_INVALID_ARGUMENT;

        if (tb[HR_V6])
                v6 = blobmsg_get_bool(tb[HR_V6]);

        if (tb[HR_INTERFACE])
                iface = vlist_find(&interfaces, blobmsg_data(tb[HR_INTERFACE]), iface, node);

        memset(&a, 0, sizeof(a));
        if (!inet_pton(v6 ? AF_INET6 : AF_INET, blobmsg_data(tb[HR_TARGET]), &a))
                return UBUS_STATUS_INVALID_ARGUMENT;


        iface = interface_ip_add_target_route(&a, v6, iface);
        if (!iface)
                return UBUS_STATUS_NOT_FOUND;

        blob_buf_init(&b, 0);
        blobmsg_add_string(&b, "interface", iface->name);
        ubus_send_reply(ctx, req, b.head);

        return 0;
}

static int
netifd_get_proto_handlers(struct ubus_context *ctx, struct ubus_object *obj,
                          struct ubus_request_data *req, const char *method,
                          struct blob_attr *msg)
{
        blob_buf_init(&b, 0);
        proto_dump_handlers(&b);
        ubus_send_reply(ctx, req, b.head);

        return 0;
}


enum {
        DI_NAME,
        __DI_MAX
};

static const struct blobmsg_policy dynamic_policy[__DI_MAX] = {
        [DI_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
};

static int
netifd_add_dynamic(struct ubus_context *ctx, struct ubus_object *obj,
                      struct ubus_request_data *req, const char *method,
                      struct blob_attr *msg)
{
        struct blob_attr *tb[__DI_MAX];
        struct interface *iface;
        struct blob_attr *config;
        struct device *dev;

        blobmsg_parse(dynamic_policy, __DI_MAX, tb, blob_data(msg), blob_len(msg));

        if (!tb[DI_NAME])
                return UBUS_STATUS_INVALID_ARGUMENT;

        const char *name = blobmsg_get_string(tb[DI_NAME]);

        iface = interface_alloc(name, msg);
        if (!iface)
                return UBUS_STATUS_UNKNOWN_ERROR;

        iface->device_config = true;

        config = blob_memdup(msg);
        if (!config)
                goto error;

        interface_add(iface, config);

        // need to look up the interface name again, in case of config update
        // the pointer will have changed
        iface = vlist_find(&interfaces, name, iface, node);
        if (!iface)
                return UBUS_STATUS_UNKNOWN_ERROR;

        // Set interface as dynamic
        interface_set_dynamic(iface);

        dev = iface->main_dev.dev;
        if (!dev || !dev->default_config)
                return UBUS_STATUS_UNKNOWN_ERROR;

        device_set_config(dev, dev->type, msg);

        if (iface->state != IFS_SETUP && iface->state != IFS_UP)
                vlist_delete(&interfaces, &iface->node);

        return UBUS_STATUS_OK;

error:
        free(iface);
        return UBUS_STATUS_UNKNOWN_ERROR;
}

static int
netifd_del_dynamic(struct ubus_context *ctx, struct ubus_object *obj,
                      struct ubus_request_data *req, const char *method,
                      struct blob_attr *msg)
{
        struct blob_attr *tb[__DI_MAX];
        struct interface *iface;

        blobmsg_parse(dynamic_policy, __DI_MAX, tb, blob_data(msg), blob_len(msg));

        if (!tb[DI_NAME])
                return UBUS_STATUS_INVALID_ARGUMENT;

        const char *name = blobmsg_get_string(tb[DI_NAME]);
        iface = vlist_find(&interfaces, name, iface, node);

        if (!iface)
                return UBUS_STATUS_NOT_FOUND;
        else if (!iface->dynamic)
                return UBUS_STATUS_INVALID_COMMAND;

        vlist_delete(&interfaces, &iface->node);
        return UBUS_STATUS_OK;
}

static struct ubus_method main_object_methods[] = {
        { .name = "restart", .handler = netifd_handle_restart },
        { .name = "reload", .handler = netifd_handle_reload },
        UBUS_METHOD("add_host_route", netifd_add_host_route, route_policy),
        { .name = "get_proto_handlers", .handler = netifd_get_proto_handlers },
        UBUS_METHOD("add_dynamic", netifd_add_dynamic, dynamic_policy),
        UBUS_METHOD("del_dynamic", netifd_del_dynamic, dynamic_policy),
};

static struct ubus_object_type main_object_type =
        UBUS_OBJECT_TYPE("netifd", main_object_methods);

static struct ubus_object main_object = {
        .name = "network",
        .type = &main_object_type,
        .methods = main_object_methods,
        .n_methods = ARRAY_SIZE(main_object_methods),
};

enum {
        DEV_NAME,
        __DEV_MAX,
};

static const struct blobmsg_policy dev_policy[__DEV_MAX] = {
        [DEV_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
};

static int
netifd_dev_status(struct ubus_context *ctx, struct ubus_object *obj,
                  struct ubus_request_data *req, const char *method,
                  struct blob_attr *msg)
{
        struct device *dev = NULL;
        struct blob_attr *tb[__DEV_MAX];

        blobmsg_parse(dev_policy, __DEV_MAX, tb, blob_data(msg), blob_len(msg));

        if (tb[DEV_NAME]) {
                dev = device_get(blobmsg_data(tb[DEV_NAME]), false);
                if (!dev)
                        return UBUS_STATUS_INVALID_ARGUMENT;
        }

        blob_buf_init(&b, 0);
        device_dump_status(&b, dev);
        ubus_send_reply(ctx, req, b.head);

        return 0;
}

enum {
        ALIAS_ATTR_ALIAS,
        ALIAS_ATTR_DEV,
        __ALIAS_ATTR_MAX,
};

static const struct blobmsg_policy alias_attrs[__ALIAS_ATTR_MAX] = {
        [ALIAS_ATTR_ALIAS] = { "alias", BLOBMSG_TYPE_ARRAY },
        [ALIAS_ATTR_DEV] = { "device", BLOBMSG_TYPE_STRING },
};

static int
netifd_handle_alias(struct ubus_context *ctx, struct ubus_object *obj,
                    struct ubus_request_data *req, const char *method,
                    struct blob_attr *msg)
{
        struct device *dev = NULL;
        struct blob_attr *tb[__ALIAS_ATTR_MAX];
        struct blob_attr *cur;
        int rem;

        blobmsg_parse(alias_attrs, __ALIAS_ATTR_MAX, tb, blob_data(msg), blob_len(msg));

        if (!tb[ALIAS_ATTR_ALIAS])
                return UBUS_STATUS_INVALID_ARGUMENT;

        if ((cur = tb[ALIAS_ATTR_DEV]) != NULL) {
                dev = device_get(blobmsg_data(cur), true);
                if (!dev)
                        return UBUS_STATUS_NOT_FOUND;
        }

        blobmsg_for_each_attr(cur, tb[ALIAS_ATTR_ALIAS], rem) {
                if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
                        goto error;

                if (!blobmsg_check_attr(cur, NULL))
                        goto error;

                alias_notify_device(blobmsg_data(cur), dev);
        }
        return 0;

error:
        device_free_unused(dev);
        return UBUS_STATUS_INVALID_ARGUMENT;
}

enum {
        DEV_STATE_NAME,
        DEV_STATE_DEFER,
        __DEV_STATE_MAX,
};

static const struct blobmsg_policy dev_state_policy[__DEV_STATE_MAX] = {
        [DEV_STATE_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
        [DEV_STATE_DEFER] = { .name = "defer", .type = BLOBMSG_TYPE_BOOL },
};

static int
netifd_handle_set_state(struct ubus_context *ctx, struct ubus_object *obj,
                        struct ubus_request_data *req, const char *method,
                        struct blob_attr *msg)
{
        struct device *dev = NULL;
        struct blob_attr *tb[__DEV_STATE_MAX];
        struct blob_attr *cur;

        blobmsg_parse(dev_state_policy, __DEV_STATE_MAX, tb, blob_data(msg), blob_len(msg));

        cur = tb[DEV_STATE_NAME];
        if (!cur)
                return UBUS_STATUS_INVALID_ARGUMENT;

        dev = device_get(blobmsg_data(cur), false);
        if (!dev)
                return UBUS_STATUS_NOT_FOUND;

        cur = tb[DEV_STATE_DEFER];
        if (cur)
                device_set_deferred(dev, !!blobmsg_get_u8(cur));

        return 0;
}

static struct ubus_method dev_object_methods[] = {
        UBUS_METHOD("status", netifd_dev_status, dev_policy),
        UBUS_METHOD("set_alias", netifd_handle_alias, alias_attrs),
        UBUS_METHOD("set_state", netifd_handle_set_state, dev_state_policy),
};

static struct ubus_object_type dev_object_type =
        UBUS_OBJECT_TYPE("device", dev_object_methods);

static struct ubus_object dev_object = {
        .name = "network.device",
        .type = &dev_object_type,
        .methods = dev_object_methods,
        .n_methods = ARRAY_SIZE(dev_object_methods),
};

static void
netifd_ubus_add_fd(void)
{
        ubus_add_uloop(ubus_ctx);
        system_fd_set_cloexec(ubus_ctx->sock.fd);
}

static void
netifd_ubus_reconnect_timer(struct uloop_timeout *timeout)
{
        static struct uloop_timeout retry = {
                .cb = netifd_ubus_reconnect_timer,
        };
        int t = 2;

        if (ubus_reconnect(ubus_ctx, ubus_path) != 0) {
                DPRINTF("failed to reconnect, trying again in %d seconds\n", t);
                uloop_timeout_set(&retry, t * 1000);
                return;
        }

        DPRINTF("reconnected to ubus, new id: %08x\n", ubus_ctx->local_id);
        netifd_ubus_add_fd();
}

static void
netifd_ubus_connection_lost(struct ubus_context *ctx)
{
        netifd_ubus_reconnect_timer(NULL);
}

/* per-interface object */

static int
netifd_handle_up(struct ubus_context *ctx, struct ubus_object *obj,
                 struct ubus_request_data *req, const char *method,
                 struct blob_attr *msg)
{
        struct interface *iface;

        iface = container_of(obj, struct interface, ubus);
        interface_set_up(iface);

        return 0;
}

static int
netifd_handle_down(struct ubus_context *ctx, struct ubus_object *obj,
                   struct ubus_request_data *req, const char *method,
                   struct blob_attr *msg)
{
        struct interface *iface;

        iface = container_of(obj, struct interface, ubus);
        interface_set_down(iface);

        return 0;
}

static void
netifd_add_interface_errors(struct blob_buf *b, struct interface *iface)
{
        struct interface_error *error;
        void *e, *e2, *e3;
        int i;

        e = blobmsg_open_array(b, "errors");
        list_for_each_entry(error, &iface->errors, list) {
                e2 = blobmsg_open_table(b, NULL);

                blobmsg_add_string(b, "subsystem", error->subsystem);
                blobmsg_add_string(b, "code", error->code);
                if (error->data[0]) {
                        e3 = blobmsg_open_array(b, "data");
                        for (i = 0; error->data[i]; i++)
                                blobmsg_add_string(b, NULL, error->data[i]);
                        blobmsg_close_array(b, e3);
                }

                blobmsg_close_table(b, e2);
        }
        blobmsg_close_array(b, e);
}

static void
interface_ip_dump_address_list(struct interface_ip_settings *ip, bool v6,
                               bool enabled)
{
        struct device_addr *addr;
        char *buf;
        void *a;
        int buflen = 128;
        int af;

        time_t now = system_get_rtime();
        vlist_for_each_element(&ip->addr, addr, node) {
                if (addr->enabled != enabled)
                        continue;

                if ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4)
                        af = AF_INET;
                else
                        af = AF_INET6;

                if (af != (v6 ? AF_INET6 : AF_INET))
                        continue;

                a = blobmsg_open_table(&b, NULL);

                buf = blobmsg_alloc_string_buffer(&b, "address", buflen);
                inet_ntop(af, &addr->addr, buf, buflen);
                blobmsg_add_string_buffer(&b);

                blobmsg_add_u32(&b, "mask", addr->mask);

                if (addr->preferred_until) {
                        int preferred = addr->preferred_until - now;
                        if (preferred < 0)
                                preferred = 0;
                        blobmsg_add_u32(&b, "preferred", preferred);
                }

                if (addr->valid_until)
                        blobmsg_add_u32(&b, "valid", addr->valid_until - now);

                if (addr->pclass)
                        blobmsg_add_string(&b, "class", addr->pclass);

                blobmsg_close_table(&b, a);
        }
}

static void
interface_ip_dump_route_list(struct interface_ip_settings *ip, bool enabled)
{
        struct device_route *route;
        int buflen = 128;
        char *buf;
        void *r;
        int af;

        time_t now = system_get_rtime();
        vlist_for_each_element(&ip->route, route, node) {
                if (route->enabled != enabled)
                        continue;

                if ((ip->no_defaultroute == enabled) && !route->mask)
                        continue;

                if ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4)
                        af = AF_INET;
                else
                        af = AF_INET6;

                r = blobmsg_open_table(&b, NULL);

                buf = blobmsg_alloc_string_buffer(&b, "target", buflen);
                inet_ntop(af, &route->addr, buf, buflen);
                blobmsg_add_string_buffer(&b);

                blobmsg_add_u32(&b, "mask", route->mask);

                buf = blobmsg_alloc_string_buffer(&b, "nexthop", buflen);
                inet_ntop(af, &route->nexthop, buf, buflen);
                blobmsg_add_string_buffer(&b);

                if (route->flags & DEVROUTE_TYPE)
                        blobmsg_add_u32(&b, "type", route->type);

                if (route->flags & DEVROUTE_MTU)
                        blobmsg_add_u32(&b, "mtu", route->mtu);

                if (route->flags & DEVROUTE_METRIC)
                        blobmsg_add_u32(&b, "metric", route->metric);

                if (route->flags & DEVROUTE_TABLE)
                        blobmsg_add_u32(&b, "table", route->table);

                if (route->valid_until)
                        blobmsg_add_u32(&b, "valid", route->valid_until - now);

                buf = blobmsg_alloc_string_buffer(&b, "source", buflen);
                inet_ntop(af, &route->source, buf, buflen);
                snprintf(buf + strlen(buf), buflen - strlen(buf), "/%u", route->sourcemask);
                blobmsg_add_string_buffer(&b);

                blobmsg_close_table(&b, r);
        }
}


static void
interface_ip_dump_prefix_list(struct interface_ip_settings *ip)
{
        struct device_prefix *prefix;
        char *buf;
        void *a, *c;
        const int buflen = INET6_ADDRSTRLEN;

        time_t now = system_get_rtime();
        vlist_for_each_element(&ip->prefix, prefix, node) {
                a = blobmsg_open_table(&b, NULL);

                buf = blobmsg_alloc_string_buffer(&b, "address", buflen);
                inet_ntop(AF_INET6, &prefix->addr, buf, buflen);
                blobmsg_add_string_buffer(&b);

                blobmsg_add_u32(&b, "mask", prefix->length);

                if (prefix->preferred_until) {
                        int preferred = prefix->preferred_until - now;
                        if (preferred < 0)
                                preferred = 0;
                        blobmsg_add_u32(&b, "preferred", preferred);
                }

                if (prefix->valid_until)
                        blobmsg_add_u32(&b, "valid", prefix->valid_until - now);

                blobmsg_add_string(&b, "class", prefix->pclass);

                c = blobmsg_open_table(&b, "assigned");
                struct device_prefix_assignment *assign;
                list_for_each_entry(assign, &prefix->assignments, head) {
                        if (!assign->name[0])
                                continue;

                        struct in6_addr addr = prefix->addr;
                        addr.s6_addr32[1] |= htonl(assign->assigned);

                        void *d = blobmsg_open_table(&b, assign->name);

                        buf = blobmsg_alloc_string_buffer(&b, "address", buflen);
                        inet_ntop(AF_INET6, &addr, buf, buflen);
                        blobmsg_add_string_buffer(&b);

                        blobmsg_add_u32(&b, "mask", assign->length);

                        blobmsg_close_table(&b, d);
                }
                blobmsg_close_table(&b, c);

                blobmsg_close_table(&b, a);
        }
}


static void
interface_ip_dump_prefix_assignment_list(struct interface *iface)
{
        void *a;
        char *buf;
        const int buflen = INET6_ADDRSTRLEN;
        time_t now = system_get_rtime();

        struct device_prefix *prefix;
        list_for_each_entry(prefix, &prefixes, head) {
                struct device_prefix_assignment *assign;
                list_for_each_entry(assign, &prefix->assignments, head) {
                        if (strcmp(assign->name, iface->name))
                                continue;

                        struct in6_addr addr = prefix->addr;
                        addr.s6_addr32[1] |= htonl(assign->assigned);

                        a = blobmsg_open_table(&b, NULL);

                        buf = blobmsg_alloc_string_buffer(&b, "address", buflen);
                        inet_ntop(AF_INET6, &addr, buf, buflen);
                        blobmsg_add_string_buffer(&b);

                        blobmsg_add_u32(&b, "mask", assign->length);

                        if (prefix->preferred_until) {
                                int preferred = prefix->preferred_until - now;
                                if (preferred < 0)
                                        preferred = 0;
                                blobmsg_add_u32(&b, "preferred", preferred);
                        }

                        if (prefix->valid_until)
                                blobmsg_add_u32(&b, "valid", prefix->valid_until - now);

                        blobmsg_close_table(&b, a);
                }
        }
}


static void
interface_ip_dump_dns_server_list(struct interface_ip_settings *ip,
                                  bool enabled)
{
        struct dns_server *dns;
        int buflen = 128;
        char *buf;

        vlist_simple_for_each_element(&ip->dns_servers, dns, node) {
                if (ip->no_dns == enabled)
                        continue;

                buf = blobmsg_alloc_string_buffer(&b, NULL, buflen);
                inet_ntop(dns->af, &dns->addr, buf, buflen);
                blobmsg_add_string_buffer(&b);
        }
}

static void
interface_ip_dump_dns_search_list(struct interface_ip_settings *ip,
                                  bool enabled)
{
        struct dns_search_domain *dns;

        vlist_simple_for_each_element(&ip->dns_search, dns, node) {
                if (ip->no_dns == enabled)
                        continue;

                blobmsg_add_string(&b, NULL, dns->name);
        }
}

static void
netifd_dump_status(struct interface *iface)
{
        struct interface_data *data;
        struct device *dev;
        void *a, *inactive;

        blobmsg_add_u8(&b, "up", iface->state == IFS_UP);
        blobmsg_add_u8(&b, "pending", iface->state == IFS_SETUP);
        blobmsg_add_u8(&b, "available", iface->available);
        blobmsg_add_u8(&b, "autostart", iface->autostart);

        if (iface->state == IFS_UP) {
                time_t cur = system_get_rtime();
                blobmsg_add_u32(&b, "uptime", cur - iface->start_time);
                if (iface->l3_dev.dev)
                        blobmsg_add_string(&b, "l3_device", iface->l3_dev.dev->ifname);
        }

        if (iface->proto_handler)
                blobmsg_add_string(&b, "proto", iface->proto_handler->name);

        dev = iface->main_dev.dev;
        if (dev && !dev->hidden &&
            !(iface->proto_handler->flags & PROTO_FLAG_NODEV))
                blobmsg_add_string(&b, "device", dev->ifname);

        if (iface->state == IFS_UP) {
                if (iface->updated) {
                        a = blobmsg_open_array(&b, "updated");

                        if (iface->updated & IUF_ADDRESS)
                                blobmsg_add_string(&b, NULL, "addresses");
                        if (iface->updated & IUF_ROUTE)
                                blobmsg_add_string(&b, NULL, "routes");
                        if (iface->updated & IUF_PREFIX)
                                blobmsg_add_string(&b, NULL, "prefixes");
                        if (iface->updated & IUF_DATA)
                                blobmsg_add_string(&b, NULL, "data");

                        blobmsg_close_array(&b, a);
                }

                if (iface->ip4table)
                        blobmsg_add_u32(&b, "ip4table", iface->ip4table);
                if (iface->ip6table)
                        blobmsg_add_u32(&b, "ip6table", iface->ip6table);                 
                blobmsg_add_u32(&b, "metric", iface->metric);
                blobmsg_add_u8(&b, "delegation", !iface->proto_ip.no_delegation);
                a = blobmsg_open_array(&b, "ipv4-address");
                interface_ip_dump_address_list(&iface->config_ip, false, true);
                interface_ip_dump_address_list(&iface->proto_ip, false, true);
                blobmsg_close_array(&b, a);
                a = blobmsg_open_array(&b, "ipv6-address");
                interface_ip_dump_address_list(&iface->config_ip, true, true);
                interface_ip_dump_address_list(&iface->proto_ip, true, true);
                blobmsg_close_array(&b, a);
                a = blobmsg_open_array(&b, "ipv6-prefix");
                interface_ip_dump_prefix_list(&iface->config_ip);
                interface_ip_dump_prefix_list(&iface->proto_ip);
                blobmsg_close_array(&b, a);
                a = blobmsg_open_array(&b, "ipv6-prefix-assignment");
                interface_ip_dump_prefix_assignment_list(iface);
                blobmsg_close_array(&b, a);
                a = blobmsg_open_array(&b, "route");
                interface_ip_dump_route_list(&iface->config_ip, true);
                interface_ip_dump_route_list(&iface->proto_ip, true);
                blobmsg_close_array(&b, a);
                a = blobmsg_open_array(&b, "dns-server");
                interface_ip_dump_dns_server_list(&iface->config_ip, true);
                interface_ip_dump_dns_server_list(&iface->proto_ip, true);
                blobmsg_close_array(&b, a);
                a = blobmsg_open_array(&b, "dns-search");
                interface_ip_dump_dns_search_list(&iface->config_ip, true);
                interface_ip_dump_dns_search_list(&iface->proto_ip, true);
                blobmsg_close_array(&b, a);

                inactive = blobmsg_open_table(&b, "inactive");
                a = blobmsg_open_array(&b, "ipv4-address");
                interface_ip_dump_address_list(&iface->config_ip, false, false);
                interface_ip_dump_address_list(&iface->proto_ip, false, false);
                blobmsg_close_array(&b, a);
                a = blobmsg_open_array(&b, "ipv6-address");
                interface_ip_dump_address_list(&iface->config_ip, true, false);
                interface_ip_dump_address_list(&iface->proto_ip, true, false);
                blobmsg_close_array(&b, a);
                a = blobmsg_open_array(&b, "route");
                interface_ip_dump_route_list(&iface->config_ip, false);
                interface_ip_dump_route_list(&iface->proto_ip, false);
                blobmsg_close_array(&b, a);
                a = blobmsg_open_array(&b, "dns-server");
                interface_ip_dump_dns_server_list(&iface->config_ip, false);
                interface_ip_dump_dns_server_list(&iface->proto_ip, false);
                blobmsg_close_array(&b, a);
                a = blobmsg_open_array(&b, "dns-search");
                interface_ip_dump_dns_search_list(&iface->config_ip, false);
                interface_ip_dump_dns_search_list(&iface->proto_ip, false);
                blobmsg_close_array(&b, a);
                blobmsg_close_table(&b, inactive);
        }

        a = blobmsg_open_table(&b, "data");
        avl_for_each_element(&iface->data, data, node)
                blobmsg_add_blob(&b, data->data);

        blobmsg_close_table(&b, a);

        if (!list_empty(&iface->errors))
                netifd_add_interface_errors(&b, iface);
}

static int
netifd_handle_status(struct ubus_context *ctx, struct ubus_object *obj,
                     struct ubus_request_data *req, const char *method,
                     struct blob_attr *msg)
{
        struct interface *iface = container_of(obj, struct interface, ubus);

        blob_buf_init(&b, 0);
        netifd_dump_status(iface);
        ubus_send_reply(ctx, req, b.head);

        return 0;
}


static int
netifd_handle_dump(struct ubus_context *ctx, struct ubus_object *obj,
                     struct ubus_request_data *req, const char *method,
                     struct blob_attr *msg)
{
        blob_buf_init(&b, 0);
        void *a = blobmsg_open_array(&b, "interface");

        struct interface *iface;
        vlist_for_each_element(&interfaces, iface, node) {
                void *i = blobmsg_open_table(&b, NULL);
                blobmsg_add_string(&b, "interface", iface->name);
                netifd_dump_status(iface);
                blobmsg_close_table(&b, i);
        }

        blobmsg_close_array(&b, a);
        ubus_send_reply(ctx, req, b.head);

        return 0;
}

static int
netifd_iface_handle_device(struct ubus_context *ctx, struct ubus_object *obj,
                           struct ubus_request_data *req, const char *method,
                           struct blob_attr *msg)
{
        struct blob_attr *tb[__DEV_MAX];
        struct interface *iface;
        bool add = !strncmp(method, "add", 3);

        iface = container_of(obj, struct interface, ubus);

        blobmsg_parse(dev_policy, __DEV_MAX, tb, blob_data(msg), blob_len(msg));

        if (!tb[DEV_NAME])
                return UBUS_STATUS_INVALID_ARGUMENT;

        return interface_handle_link(iface, blobmsg_data(tb[DEV_NAME]), add);
}


static int
netifd_iface_notify_proto(struct ubus_context *ctx, struct ubus_object *obj,
                          struct ubus_request_data *req, const char *method,
                          struct blob_attr *msg)
{
        struct interface *iface;

        iface = container_of(obj, struct interface, ubus);

        if (!iface->proto || !iface->proto->notify)
                return UBUS_STATUS_NOT_SUPPORTED;

        return iface->proto->notify(iface->proto, msg);
}

static void
netifd_iface_do_remove(struct uloop_timeout *timeout)
{
        struct interface *iface;

        iface = container_of(timeout, struct interface, remove_timer);
        vlist_delete(&interfaces, &iface->node);
}

static int
netifd_iface_remove(struct ubus_context *ctx, struct ubus_object *obj,
                    struct ubus_request_data *req, const char *method,
                    struct blob_attr *msg)
{
        struct interface *iface;

        iface = container_of(obj, struct interface, ubus);
        if (iface->remove_timer.cb)
                return UBUS_STATUS_INVALID_ARGUMENT;

        iface->remove_timer.cb = netifd_iface_do_remove;
        uloop_timeout_set(&iface->remove_timer, 100);
        return 0;
}

static int
netifd_handle_iface_prepare(struct ubus_context *ctx, struct ubus_object *obj,
                            struct ubus_request_data *req, const char *method,
                            struct blob_attr *msg)
{
        struct interface *iface;
        struct device *dev;
        const struct device_hotplug_ops *ops;

        iface = container_of(obj, struct interface, ubus);
        dev = iface->main_dev.dev;
        if (!dev)
                return 0;

        ops = dev->hotplug_ops;
        if (!ops)
                return 0;

        return ops->prepare(dev);
}

static int
netifd_handle_set_data(struct ubus_context *ctx, struct ubus_object *obj,
                       struct ubus_request_data *req, const char *method,
                       struct blob_attr *msg)
{
        struct interface *iface;
        struct blob_attr *cur;
        int rem, ret;

        iface = container_of(obj, struct interface, ubus);

        blob_for_each_attr(cur, msg, rem) {
                ret = interface_add_data(iface, cur);
                if (ret)
                        return ret;
        }

        return 0;
}

static struct ubus_method iface_object_methods[] = {
        { .name = "up", .handler = netifd_handle_up },
        { .name = "down", .handler = netifd_handle_down },
        { .name = "status", .handler = netifd_handle_status },
        { .name = "prepare", .handler = netifd_handle_iface_prepare },
        { .name = "dump", .handler = netifd_handle_dump },
        UBUS_METHOD("add_device", netifd_iface_handle_device, dev_policy ),
        UBUS_METHOD("remove_device", netifd_iface_handle_device, dev_policy ),
        { .name = "notify_proto", .handler = netifd_iface_notify_proto },
        { .name = "remove", .handler = netifd_iface_remove },
        { .name = "set_data", .handler = netifd_handle_set_data },
};

static struct ubus_object_type iface_object_type =
        UBUS_OBJECT_TYPE("netifd_iface", iface_object_methods);


static struct ubus_object iface_object = {
        .name = "network.interface",
        .type = &iface_object_type,
        .n_methods = ARRAY_SIZE(iface_object_methods),
};

static void netifd_add_object(struct ubus_object *obj)
{
        int ret = ubus_add_object(ubus_ctx, obj);

        if (ret != 0)
                fprintf(stderr, "Failed to publish object '%s': %s\n", obj->name, ubus_strerror(ret));
}

static const struct blobmsg_policy iface_policy = {
        .name = "interface",
        .type = BLOBMSG_TYPE_STRING,
};

static int
netifd_handle_iface(struct ubus_context *ctx, struct ubus_object *obj,
                    struct ubus_request_data *req, const char *method,
                    struct blob_attr *msg)
{
        struct interface *iface;
        struct blob_attr *tb;
        int i;

        blobmsg_parse(&iface_policy, 1, &tb, blob_data(msg), blob_len(msg));
        if (!tb)
                return UBUS_STATUS_INVALID_ARGUMENT;

        iface = vlist_find(&interfaces, blobmsg_data(tb), iface, node);
        if (!iface)
                return UBUS_STATUS_NOT_FOUND;

        for (i = 0; i < ARRAY_SIZE(iface_object_methods); i++) {
                ubus_handler_t cb;

                if (strcmp(method, iface_object_methods[i].name) != 0)
                        continue;

                cb = iface_object_methods[i].handler;
                return cb(ctx, &iface->ubus, req, method, msg);
        }

        return UBUS_STATUS_INVALID_ARGUMENT;
}

static void netifd_add_iface_object(void)
{
        struct ubus_method *methods;
        int i;

        methods = calloc(1, sizeof(iface_object_methods));
        memcpy(methods, iface_object_methods, sizeof(iface_object_methods));
        iface_object.methods = methods;

        for (i = 0; i < ARRAY_SIZE(iface_object_methods); i++) {
                if (methods[i].handler == netifd_handle_dump)
                        continue;

                methods[i].handler = netifd_handle_iface;
                methods[i].policy = &iface_policy;
                methods[i].n_policy = 1;
        }
        netifd_add_object(&iface_object);
}

static struct wireless_device *
get_wdev(struct blob_attr *msg, int *ret)
{
        struct blobmsg_policy wdev_policy = {
                .name = "device",
                .type = BLOBMSG_TYPE_STRING,
        };
        struct blob_attr *dev_attr;
        struct wireless_device *wdev = NULL;


        blobmsg_parse(&wdev_policy, 1, &dev_attr, blob_data(msg), blob_len(msg));
        if (!dev_attr) {
                *ret = UBUS_STATUS_INVALID_ARGUMENT;
                return NULL;
        }

        wdev = vlist_find(&wireless_devices, blobmsg_data(dev_attr), wdev, node);
        if (!wdev) {
                *ret = UBUS_STATUS_NOT_FOUND;
                return NULL;
        }

        *ret = 0;
        return wdev;
}

static int
netifd_handle_wdev_up(struct ubus_context *ctx, struct ubus_object *obj,
                      struct ubus_request_data *req, const char *method,
                      struct blob_attr *msg)
{
        struct wireless_device *wdev;
        int ret;

        wdev = get_wdev(msg, &ret);
        if (ret == UBUS_STATUS_NOT_FOUND)
                return ret;

        if (wdev) {
                wireless_device_set_up(wdev);
        } else {
                vlist_for_each_element(&wireless_devices, wdev, node)
                        wireless_device_set_up(wdev);
        }

        return 0;
}

static int
netifd_handle_wdev_down(struct ubus_context *ctx, struct ubus_object *obj,
                        struct ubus_request_data *req, const char *method,
                        struct blob_attr *msg)
{
        struct wireless_device *wdev;
        int ret;

        wdev = get_wdev(msg, &ret);
        if (ret == UBUS_STATUS_NOT_FOUND)
                return ret;

        if (wdev) {
                wireless_device_set_down(wdev);
        } else {
                vlist_for_each_element(&wireless_devices, wdev, node)
                        wireless_device_set_down(wdev);
        }

        return 0;
}

static int
netifd_handle_wdev_status(struct ubus_context *ctx, struct ubus_object *obj,
                          struct ubus_request_data *req, const char *method,
                          struct blob_attr *msg)
{
        struct wireless_device *wdev;
        int ret;

        wdev = get_wdev(msg, &ret);
        if (ret == UBUS_STATUS_NOT_FOUND)
                return ret;

        blob_buf_init(&b, 0);
        if (wdev) {
                wireless_device_status(wdev, &b);
        } else {
                vlist_for_each_element(&wireless_devices, wdev, node)
                        wireless_device_status(wdev, &b);
        }
        ubus_send_reply(ctx, req, b.head);
        return 0;
}

static int
netifd_handle_wdev_get_validate(struct ubus_context *ctx, struct ubus_object *obj,
                          struct ubus_request_data *req, const char *method,
                          struct blob_attr *msg)
{
        struct wireless_device *wdev;
        int ret;

        wdev = get_wdev(msg, &ret);
        if (ret == UBUS_STATUS_NOT_FOUND)
                return ret;

        blob_buf_init(&b, 0);
        if (wdev) {
                wireless_device_get_validate(wdev, &b);
        } else {
                vlist_for_each_element(&wireless_devices, wdev, node)
                        wireless_device_get_validate(wdev, &b);
        }
        ubus_send_reply(ctx, req, b.head);
        return 0;
}

static int
netifd_handle_wdev_notify(struct ubus_context *ctx, struct ubus_object *obj,
                          struct ubus_request_data *req, const char *method,
                          struct blob_attr *msg)
{
        struct wireless_device *wdev;
        int ret;

        wdev = get_wdev(msg, &ret);
        if (!wdev)
                return ret;

        return wireless_device_notify(wdev, msg, req);
}

static struct ubus_method wireless_object_methods[] = {
        { .name = "up", .handler = netifd_handle_wdev_up },
        { .name = "down", .handler = netifd_handle_wdev_down },
        { .name = "status", .handler = netifd_handle_wdev_status },
        { .name = "notify", .handler = netifd_handle_wdev_notify },
        { .name = "get_validate", .handler = netifd_handle_wdev_get_validate },
};

static struct ubus_object_type wireless_object_type =
        UBUS_OBJECT_TYPE("netifd_iface", wireless_object_methods);


static struct ubus_object wireless_object = {
        .name = "network.wireless",
        .type = &wireless_object_type,
        .methods = wireless_object_methods,
        .n_methods = ARRAY_SIZE(wireless_object_methods),
};

int
netifd_ubus_init(const char *path)
{
        uloop_init();
        ubus_path = path;

        ubus_ctx = ubus_connect(path);
        if (!ubus_ctx)
                return -EIO;

        DPRINTF("connected as %08x\n", ubus_ctx->local_id);
        ubus_ctx->connection_lost = netifd_ubus_connection_lost;
        netifd_ubus_add_fd();

        netifd_add_object(&main_object);
        netifd_add_object(&dev_object);
        netifd_add_object(&wireless_object);
        netifd_add_iface_object();

        return 0;
}

void
netifd_ubus_done(void)
{
        ubus_free(ubus_ctx);
}

void
netifd_ubus_interface_event(struct interface *iface, bool up)
{
        blob_buf_init(&b, 0);
        blobmsg_add_string(&b, "action", up ? "ifup" : "ifdown");
        blobmsg_add_string(&b, "interface", iface->name);
        ubus_send_event(ubus_ctx, "network.interface", b.head);
}

void
netifd_ubus_interface_notify(struct interface *iface, bool up)
{
        const char *event = (up) ? "interface.update" : "interface.down";
        blob_buf_init(&b, 0);
        blobmsg_add_string(&b, "interface", iface->name);
        netifd_dump_status(iface);
        ubus_notify(ubus_ctx, &iface_object, event, b.head, -1);
        ubus_notify(ubus_ctx, &iface->ubus, event, b.head, -1);
}

void
netifd_ubus_add_interface(struct interface *iface)
{
        struct ubus_object *obj = &iface->ubus;
        char *name = NULL;

        if (asprintf(&name, "%s.interface.%s", main_object.name, iface->name) == -1)
                return;

        obj->name = name;
        obj->type = &iface_object_type;
        obj->methods = iface_object_methods;
        obj->n_methods = ARRAY_SIZE(iface_object_methods);
        if (ubus_add_object(ubus_ctx, &iface->ubus)) {
                DPRINTF("failed to publish ubus object for interface '%s'\n", iface->name);
                free(name);
                obj->name = NULL;
        }
}

void
netifd_ubus_remove_interface(struct interface *iface)
{
        if (!iface->ubus.name)
                return;

        ubus_remove_object(ubus_ctx, &iface->ubus);
        free((void *) iface->ubus.name);
}