2 * Copyright (C) 2015 Felix Fietkau <nbd@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 2.1
6 * as published by the Free Software Foundation
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
16 static struct ubus_object *monitor_obj;
17 static LIST_HEAD(monitors);
20 struct list_head list;
21 struct ubus_client *cl;
26 ubusd_monitor_free(struct ubus_monitor *m)
33 ubusd_monitor_connect(struct ubus_client *cl, struct ubus_msg_buf *ub)
35 struct ubus_monitor *m;
37 ubusd_monitor_disconnect(cl);
39 m = calloc(1, sizeof(*m));
41 list_add(&m->list, &monitors);
45 ubusd_monitor_disconnect(struct ubus_client *cl)
47 struct ubus_monitor *m;
49 list_for_each_entry(m, &monitors, list) {
53 ubusd_monitor_free(m);
59 ubusd_monitor_message(struct ubus_client *cl, struct ubus_msg_buf *ub, bool send)
61 static struct blob_buf mb;
62 struct ubus_monitor *m;
64 if (list_empty(&monitors))
67 blob_buf_init(&mb, 0);
68 blob_put_int32(&mb, UBUS_MONITOR_CLIENT, cl->id.id);
69 blob_put_int32(&mb, UBUS_MONITOR_PEER, ub->hdr.peer);
70 blob_put_int32(&mb, UBUS_MONITOR_SEQ, ub->hdr.seq);
71 blob_put_int32(&mb, UBUS_MONITOR_TYPE, ub->hdr.type);
72 blob_put_int8(&mb, UBUS_MONITOR_SEND, send);
73 blob_put(&mb, UBUS_MONITOR_DATA, blob_data(ub->data), blob_len(ub->data));
75 list_for_each_entry(m, &monitors, list) {
76 ub = ubus_msg_new(mb.head, blob_raw_len(mb.head), true);
77 ub->hdr.type = UBUS_MSG_MONITOR;
78 ub->hdr.seq = ++m->seq;
79 ubus_msg_send(m->cl, ub, true);
84 ubusd_monitor_recv(struct ubus_client *cl, struct ubus_msg_buf *ub,
85 const char *method, struct blob_attr *msg)
87 /* Only root is allowed for now */
88 if (cl->uid != 0 || cl->gid != 0)
89 return UBUS_STATUS_PERMISSION_DENIED;
91 if (!strcmp(method, "add")) {
92 ubusd_monitor_connect(cl, ub);
96 if (!strcmp(method, "remove")) {
97 ubusd_monitor_disconnect(cl);
101 return UBUS_STATUS_METHOD_NOT_FOUND;
105 ubusd_monitor_init(void)
107 monitor_obj = ubusd_create_object_internal(NULL, UBUS_SYSTEM_OBJECT_MONITOR);
108 if (monitor_obj != NULL)
109 monitor_obj->recv_msg = ubusd_monitor_recv;