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));
44 list_add_tail(&m->list, &monitors);
49 static struct ubus_monitor*
50 ubusd_monitor_find(struct ubus_client *cl)
52 struct ubus_monitor *m, *tmp;
54 list_for_each_entry_safe(m, tmp, &monitors, list) {
65 ubusd_monitor_disconnect(struct ubus_client *cl)
67 struct ubus_monitor *m;
69 m = ubusd_monitor_find(cl);
73 ubusd_monitor_free(m);
77 ubusd_monitor_message(struct ubus_client *cl, struct ubus_msg_buf *ub, bool send)
79 static struct blob_buf mb;
80 struct ubus_monitor *m;
82 if (list_empty(&monitors))
85 blob_buf_init(&mb, 0);
86 blob_put_int32(&mb, UBUS_MONITOR_CLIENT, cl->id.id);
87 blob_put_int32(&mb, UBUS_MONITOR_PEER, ub->hdr.peer);
88 blob_put_int32(&mb, UBUS_MONITOR_SEQ, ub->hdr.seq);
89 blob_put_int32(&mb, UBUS_MONITOR_TYPE, ub->hdr.type);
90 blob_put_int8(&mb, UBUS_MONITOR_SEND, send);
91 blob_put(&mb, UBUS_MONITOR_DATA, blob_data(ub->data), blob_len(ub->data));
93 ub = ubus_msg_new(mb.head, blob_raw_len(mb.head), true);
94 ub->hdr.type = UBUS_MSG_MONITOR;
96 list_for_each_entry(m, &monitors, list) {
97 ub->hdr.seq = ++m->seq;
98 ubus_msg_send(m->cl, ub);
105 ubusd_monitor_recv(struct ubus_client *cl, struct ubus_msg_buf *ub,
106 const char *method, struct blob_attr *msg)
108 /* Only root is allowed for now */
109 if (cl->uid != 0 || cl->gid != 0)
110 return UBUS_STATUS_PERMISSION_DENIED;
112 if (!strcmp(method, "add")) {
113 if (!ubusd_monitor_connect(cl, ub))
114 return UBUS_STATUS_UNKNOWN_ERROR;
116 return UBUS_STATUS_OK;
119 if (!strcmp(method, "remove")) {
120 ubusd_monitor_disconnect(cl);
121 return UBUS_STATUS_OK;
124 return UBUS_STATUS_METHOD_NOT_FOUND;
128 ubusd_monitor_init(void)
130 monitor_obj = ubusd_create_object_internal(NULL, UBUS_SYSTEM_OBJECT_MONITOR);
131 if (monitor_obj != NULL)
132 monitor_obj->recv_msg = ubusd_monitor_recv;