3 static struct avl_tree patterns;
4 static LIST_HEAD(catch_all);
5 static struct ubus_object *event_obj;
6 static int event_seq = 0;
14 struct list_head list;
15 struct ubus_object *obj;
22 struct list_head list;
27 static void ubusd_delete_event_source(struct event_source *evs)
32 avl_delete(&patterns, &evs->pattern.avl);
35 list_del(&evs->catchall.list);
41 void ubusd_event_cleanup_object(struct ubus_object *obj)
43 struct event_source *ev;
45 while (!list_empty(&obj->events)) {
46 ev = list_first_entry(&obj->events, struct event_source, list);
47 ubusd_delete_event_source(ev);
57 static struct blobmsg_policy evr_policy[] = {
58 [EVREG_PATTERN] = { .name = "pattern", .type = BLOBMSG_TYPE_STRING },
59 [EVREG_OBJECT] = { .name = "object", .type = BLOBMSG_TYPE_INT32 },
63 static struct event_source *ubusd_alloc_event_source(struct ubus_object *obj, enum evs_type type, int datalen)
65 struct event_source *evs;
67 evs = calloc(1, sizeof(*evs) + datalen);
68 list_add(&evs->list, &obj->events);
74 static int ubusd_alloc_catchall(struct ubus_object *obj)
76 struct event_source *evs;
78 evs = ubusd_alloc_event_source(obj, EVS_CATCHALL, 0);
79 list_add(&evs->catchall.list, &catch_all);
84 static int ubusd_alloc_event_pattern(struct ubus_client *cl, struct blob_attr *msg)
86 struct event_source *ev;
87 struct ubus_object *obj;
88 struct blob_attr *attr[EVREG_LAST];
92 blobmsg_parse(evr_policy, EVREG_LAST, attr, blob_data(msg), blob_len(msg));
93 if (!attr[EVREG_OBJECT])
94 return UBUS_STATUS_INVALID_ARGUMENT;
96 id = blobmsg_get_u32(attr[EVREG_OBJECT]);
97 if (id < UBUS_SYSTEM_OBJECT_MAX)
98 return UBUS_STATUS_PERMISSION_DENIED;
100 obj = ubusd_find_object(id);
102 return UBUS_STATUS_NOT_FOUND;
104 if (obj->client != cl)
105 return UBUS_STATUS_PERMISSION_DENIED;
107 if (!attr[EVREG_PATTERN])
108 return ubusd_alloc_catchall(obj);
110 pattern = blobmsg_data(attr[EVREG_PATTERN]);
111 ev = ubusd_alloc_event_source(obj, EVS_PATTERN, strlen(pattern) + 1);
112 ev->pattern.avl.key = (void *) (ev + 1);
113 strcpy(ev->pattern.avl.key, pattern);
114 avl_insert(&patterns, &ev->pattern.avl);
125 static struct blobmsg_policy ev_policy[] = {
126 [EVMSG_ID] = { .name = "id", .type = BLOBMSG_TYPE_STRING },
127 [EVMSG_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
130 static void ubusd_send_event_msg(struct ubus_msg_buf **ub, struct ubus_object *obj,
131 const char *id, struct blob_attr *msg)
136 objid_ptr = blob_data(blob_data((*ub)->data));
137 *objid_ptr = htonl(obj->id.id);
139 blob_buf_init(&b, 0);
140 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id.id);
141 blob_put_string(&b, UBUS_ATTR_METHOD, id);
142 blob_put(&b, UBUS_ATTR_DATA, blobmsg_data(msg), blobmsg_data_len(msg));
144 *ub = ubus_msg_new(b.head, blob_raw_len(b.head), true);
146 (*ub)->hdr.type = UBUS_MSG_INVOKE;
149 (*ub)->hdr.seq = ++event_seq;
150 ubus_msg_send(obj->client, *ub, false);
153 static int ubusd_send_event(struct ubus_client *cl, struct blob_attr *msg)
155 struct ubus_msg_buf *ub = NULL;
156 struct event_source *ev;
157 struct blob_attr *attr[EVMSG_LAST];
160 blobmsg_parse(ev_policy, EVMSG_LAST, attr, blob_data(msg), blob_len(msg));
161 if (!attr[EVMSG_ID] || !attr[EVMSG_DATA])
162 return UBUS_STATUS_INVALID_ARGUMENT;
164 id = blobmsg_data(attr[EVMSG_ID]);
165 list_for_each_entry(ev, &catch_all, catchall.list) {
166 /* do not loop back events */
167 if (ev->obj->client == cl)
170 ubusd_send_event_msg(&ub, ev->obj, id, attr[EVMSG_DATA]);
179 static int ubusd_event_recv(struct ubus_client *cl, const char *method, struct blob_attr *msg)
181 if (!strcmp(method, "register"))
182 return ubusd_alloc_event_pattern(cl, msg);
184 if (!strcmp(method, "send"))
185 return ubusd_send_event(cl, msg);
187 return UBUS_STATUS_INVALID_COMMAND;
190 void ubusd_event_init(void)
192 ubus_init_string_tree(&patterns, true);
193 event_obj = ubusd_create_object_internal(NULL, UBUS_SYSTEM_OBJECT_EVENT);
194 event_obj->recv_msg = ubusd_event_recv;