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/*
* ustp - OpenWrt STP/RSTP/MSTP daemon
* Copyright (C) 2021 Felix Fietkau <nbd@nbd.name>
*
* 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 <libubus.h>
#include <libubox/uloop.h>
#include "config.h"
#include "mstp.h"
#include "worker.h"
#include "ubus.h"
struct blob_buf b;
enum bridge_config_attr {
BRIDGE_CONFIG_NAME,
BRIDGE_CONFIG_PROTO,
BRIDGE_CONFIG_FWD_DELAY,
BRIDGE_CONFIG_HELLO_TIME,
BRIDGE_CONFIG_MAX_AGE,
BRIDGE_CONFIG_AGEING_TIME,
__BRIDGE_CONFIG_MAX
};
static const struct blobmsg_policy bridge_config_policy[__BRIDGE_CONFIG_MAX] = {
[BRIDGE_CONFIG_NAME] = { "name", BLOBMSG_TYPE_STRING },
[BRIDGE_CONFIG_PROTO] = { "proto", BLOBMSG_TYPE_STRING },
[BRIDGE_CONFIG_FWD_DELAY] = { "forward_delay", BLOBMSG_TYPE_INT32 },
[BRIDGE_CONFIG_HELLO_TIME] = { "hello_time", BLOBMSG_TYPE_INT32 },
[BRIDGE_CONFIG_MAX_AGE] = { "max_age", BLOBMSG_TYPE_INT32 },
[BRIDGE_CONFIG_AGEING_TIME] = { "ageing_time", BLOBMSG_TYPE_INT32 },
};
static bool
ubus_set_bridge_config(struct blob_attr *attr)
{
struct blob_attr *tb[__BRIDGE_CONFIG_MAX], *cur;
struct bridge_config *cfg;
CIST_BridgeConfig *bc;
blobmsg_parse(bridge_config_policy, __BRIDGE_CONFIG_MAX, tb,
blobmsg_data(attr), blobmsg_len(attr));
cur = tb[BRIDGE_CONFIG_NAME];
if (!cur)
return false;
cfg = bridge_config_get(blobmsg_get_string(cur), true);
bc = &cfg->config;
bc->protocol_version = protoRSTP;
bc->set_protocol_version = true;
if ((cur = tb[BRIDGE_CONFIG_PROTO]) != NULL) {
const char *proto = blobmsg_get_string(cur);
if (!strcmp(proto, "mstp"))
bc->protocol_version = protoMSTP;
else if (!strcmp(proto, "stp"))
bc->protocol_version = protoSTP;
}
if ((cur = tb[BRIDGE_CONFIG_FWD_DELAY]) != NULL) {
bc->bridge_forward_delay = blobmsg_get_u32(cur);
bc->set_bridge_forward_delay = true;
}
if ((cur = tb[BRIDGE_CONFIG_HELLO_TIME]) != NULL) {
bc->bridge_hello_time = blobmsg_get_u32(cur);
bc->set_bridge_hello_time = true;
}
if ((cur = tb[BRIDGE_CONFIG_AGEING_TIME]) != NULL) {
bc->bridge_ageing_time = blobmsg_get_u32(cur);
bc->set_bridge_ageing_time = true;
}
if ((cur = tb[BRIDGE_CONFIG_MAX_AGE]) != NULL) {
bc->bridge_max_age = blobmsg_get_u32(cur);
bc->set_bridge_max_age = true;
}
return true;
}
static int
ubus_add_bridge(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
if (!ubus_set_bridge_config(msg))
return UBUS_STATUS_INVALID_ARGUMENT;
return 0;
}
enum bridge_state_attr {
BRIDGE_STATE_NAME,
BRIDGE_STATE_ENABLED,
__BRIDGE_STATE_MAX
};
static const struct blobmsg_policy bridge_state_policy[__BRIDGE_STATE_MAX] = {
[BRIDGE_STATE_NAME] = { "name", BLOBMSG_TYPE_STRING },
[BRIDGE_STATE_ENABLED] = { "enabled", BLOBMSG_TYPE_BOOL },
};
static int
ubus_bridge_state(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct blob_attr *tb[__BRIDGE_STATE_MAX];
struct bridge_config *cfg;
const char *bridge_name;
struct worker_event ev = {};
blobmsg_parse(bridge_state_policy, __BRIDGE_STATE_MAX, tb,
blobmsg_data(msg), blobmsg_len(msg));
if (!tb[BRIDGE_STATE_NAME] || !tb[BRIDGE_STATE_ENABLED])
return UBUS_STATUS_INVALID_ARGUMENT;
bridge_name = blobmsg_get_string(tb[BRIDGE_STATE_NAME]);
ev.bridge_idx = if_nametoindex(bridge_name);
if (!ev.bridge_idx)
return UBUS_STATUS_NOT_FOUND;
if (blobmsg_get_bool(tb[BRIDGE_STATE_ENABLED])) {
cfg = bridge_config_get(bridge_name, false);
if (!cfg)
return UBUS_STATUS_NOT_FOUND;
ev.type = WORKER_EV_BRIDGE_ADD;
ev.bridge_config = cfg->config;
} else {
ev.type = WORKER_EV_BRIDGE_REMOVE;
}
worker_queue_event(&ev);
return 0;
}
static const struct ubus_method ustp_methods[] = {
UBUS_METHOD("add_bridge", ubus_add_bridge, bridge_config_policy),
UBUS_METHOD("bridge_state", ubus_bridge_state, bridge_state_policy),
};
static struct ubus_object_type ustp_object_type =
UBUS_OBJECT_TYPE("ustp", ustp_methods);
static struct ubus_object ustp_object = {
.name = "ustp",
.type = &ustp_object_type,
.methods = ustp_methods,
.n_methods = ARRAY_SIZE(ustp_methods),
};
static int
netifd_device_cb(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
if (strcmp(method, "stp_init") != 0)
return 0;
ubus_set_bridge_config(msg);
return 0;
}
static struct ubus_auto_conn conn;
static struct ubus_subscriber netifd_sub;
static void netifd_sub_cb(struct uloop_timeout *t)
{
uint32_t id;
if (ubus_lookup_id(&conn.ctx, "network.device", &id) != 0 ||
ubus_subscribe(&conn.ctx, &netifd_sub, id) != 0) {
uloop_timeout_set(t, 1000);
return;
}
blob_buf_init(&b, 0);
ubus_invoke(&conn.ctx, id, "stp_init", b.head, NULL, NULL, 1000);
}
static struct uloop_timeout netifd_sub_timer = {
.cb = netifd_sub_cb,
};
static void
netifd_device_remove_cb(struct ubus_context *ctx,
struct ubus_subscriber *obj, uint32_t id)
{
uloop_timeout_set(&netifd_sub_timer, 1000);
}
static struct ubus_subscriber netifd_sub = {
.cb = netifd_device_cb,
.remove_cb = netifd_device_remove_cb,
};
static void
ubus_connect_handler(struct ubus_context *ctx)
{
ubus_add_object(ctx, &ustp_object);
ubus_register_subscriber(ctx, &netifd_sub);
uloop_timeout_set(&netifd_sub_timer, 1);
}
void ustp_ubus_init(void)
{
conn.cb = ubus_connect_handler;
ubus_auto_connect(&conn);
}
void ustp_ubus_exit(void)
{
uint32_t id;
ubus_remove_object(&conn.ctx, &ustp_object);
ubus_unregister_subscriber(&conn.ctx, &netifd_sub);
blob_buf_init(&b, 0);
if (ubus_lookup_id(&conn.ctx, "network.device", &id) == 0)
ubus_invoke(&conn.ctx, id, "stp_init", b.head, NULL, NULL, 1000);
ubus_auto_shutdown(&conn);
}
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