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/*
* Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2013 John Crispin <blogic@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
* 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 <linux/types.h>
#include <libubox/uloop.h>
#include <libubox/blobmsg_json.h>
#include "procd.h"
#include "syslog.h"
static struct ubus_subscriber log_event;
static int notify;
struct ubus_context *_ctx;
static struct blob_buf b;
static const struct blobmsg_policy read_policy =
{ .name = "lines", .type = BLOBMSG_TYPE_INT32 };
static const struct blobmsg_policy write_policy =
{ .name = "event", .type = BLOBMSG_TYPE_STRING };
static int read_log(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct blob_attr *tb;
struct log_head *l;
void *lines, *entry;
int count = 0;
if (msg) {
blobmsg_parse(&read_policy, 1, &tb, blob_data(msg), blob_len(msg));
if (tb)
count = blobmsg_get_u32(tb);
}
blob_buf_init(&b, 0);
lines = blobmsg_open_array(&b, "lines");
l = log_list(count, NULL);
while (l) {
entry = blobmsg_open_table(&b, NULL);
blobmsg_add_string(&b, "msg", l->data);
blobmsg_add_u32(&b, "id", l->id);
blobmsg_add_u32(&b, "priority", l->priority);
blobmsg_add_u32(&b, "source", l->source);
blobmsg_add_u64(&b, "time", l->ts.tv_sec);
blobmsg_close_table(&b, entry);
l = log_list(count, l);
}
blobmsg_close_table(&b, lines);
ubus_send_reply(ctx, req, b.head);
return 0;
}
static int write_log(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct blob_attr *tb;
char *event;
if (msg) {
blobmsg_parse(&write_policy, 1, &tb, blob_data(msg), blob_len(msg));
if (tb) {
event = blobmsg_get_string(tb);
log_add(event, strlen(event) + 1, SOURCE_SYSLOG);
}
}
return 0;
}
static void log_subscribe_cb(struct ubus_context *ctx, struct ubus_object *obj)
{
notify = obj->has_subscribers;
}
static const struct ubus_method log_methods[] = {
{ .name = "read", .handler = read_log, .policy = &read_policy, .n_policy = 1 },
{ .name = "write", .handler = write_log, .policy = &write_policy, .n_policy = 1 },
};
static struct ubus_object_type log_object_type =
UBUS_OBJECT_TYPE("log", log_methods);
static struct ubus_object log_object = {
.name = "log",
.type = &log_object_type,
.methods = log_methods,
.n_methods = ARRAY_SIZE(log_methods),
.subscribe_cb = log_subscribe_cb,
};
void ubus_notify_log(struct log_head *l)
{
int ret;
if (!notify)
return;
blob_buf_init(&b, 0);
blobmsg_add_u32(&b, "id", l->id);
blobmsg_add_u32(&b, "priority", l->priority);
blobmsg_add_u32(&b, "source", l->source);
blobmsg_add_u64(&b, "time", (((__u64) l->ts.tv_sec) * 1000) + (l->ts.tv_nsec / 1000000));
ret = ubus_notify(_ctx, &log_object, l->data, b.head, -1);
if (ret)
ERROR("Failed to notify log: %s\n", ubus_strerror(ret));
}
void ubus_init_log(struct ubus_context *ctx)
{
int ret;
_ctx = ctx;
ret = ubus_add_object(ctx, &log_object);
if (ret)
ERROR("Failed to add object: %s\n", ubus_strerror(ret));
ret = ubus_register_subscriber(ctx, &log_event);
if (ret)
ERROR("Failed to add watch handler: %s\n", ubus_strerror(ret));
}
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