#include "ubusd.h"
static struct avl_tree patterns;
+static LIST_HEAD(catch_all);
static struct ubus_object *event_obj;
+static int event_seq = 0;
-struct event_pattern {
- struct avl_node avl;
+enum evs_type {
+ EVS_PATTERN,
+ EVS_CATCHALL
+};
- struct ubus_object *obj;
+struct event_source {
struct list_head list;
-
- const char *path;
+ struct ubus_object *obj;
+ enum evs_type type;
+ union {
+ struct {
+ struct avl_node avl;
+ } pattern;
+ struct {
+ struct list_head list;
+ } catchall;
+ };
};
-static void ubusd_delete_event_pattern(struct event_pattern *ev)
+static void ubusd_delete_event_source(struct event_source *evs)
{
- list_del(&ev->list);
- avl_delete(&patterns, &ev->avl);
- free(ev);
+ list_del(&evs->list);
+ switch (evs->type) {
+ case EVS_PATTERN:
+ avl_delete(&patterns, &evs->pattern.avl);
+ break;
+ case EVS_CATCHALL:
+ list_del(&evs->catchall.list);
+ break;
+ }
+ free(evs);
}
void ubusd_event_cleanup_object(struct ubus_object *obj)
{
- struct event_pattern *ev;
+ struct event_source *ev;
- while (!list_empty(&obj->event_patterns)) {
- ev = list_first_entry(&obj->event_patterns,
- struct event_pattern, list);
- ubusd_delete_event_pattern(ev);
+ while (!list_empty(&obj->events)) {
+ ev = list_first_entry(&obj->events, struct event_source, list);
+ ubusd_delete_event_source(ev);
}
}
-static int ubusd_event_recv(struct ubus_client *cl, const char *method, struct blob_attr *msg)
+enum {
+ EVREG_PATTERN,
+ EVREG_OBJECT,
+ EVREG_LAST,
+};
+
+static struct blobmsg_policy evr_policy[] = {
+ [EVREG_PATTERN] = { .name = "pattern", .type = BLOBMSG_TYPE_STRING },
+ [EVREG_OBJECT] = { .name = "object", .type = BLOBMSG_TYPE_INT32 },
+};
+
+
+static struct event_source *ubusd_alloc_event_source(struct ubus_object *obj, enum evs_type type, int datalen)
+{
+ struct event_source *evs;
+
+ evs = calloc(1, sizeof(*evs) + datalen);
+ list_add(&evs->list, &obj->events);
+ evs->obj = obj;
+ evs->type = type;
+ return evs;
+}
+
+static int ubusd_alloc_catchall(struct ubus_object *obj)
+{
+ struct event_source *evs;
+
+ evs = ubusd_alloc_event_source(obj, EVS_CATCHALL, 0);
+ list_add(&evs->catchall.list, &catch_all);
+
+ return 0;
+}
+
+static int ubusd_alloc_event_pattern(struct ubus_client *cl, struct blob_attr *msg)
+{
+ struct event_source *ev;
+ struct ubus_object *obj;
+ struct blob_attr *attr[EVREG_LAST];
+ const char *pattern;
+ uint32_t id;
+
+ blobmsg_parse(evr_policy, EVREG_LAST, attr, blob_data(msg), blob_len(msg));
+ if (!attr[EVREG_OBJECT])
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ id = blobmsg_get_u32(attr[EVREG_OBJECT]);
+ if (id < UBUS_SYSTEM_OBJECT_MAX)
+ return UBUS_STATUS_PERMISSION_DENIED;
+
+ obj = ubusd_find_object(id);
+ if (!obj)
+ return UBUS_STATUS_NOT_FOUND;
+
+ if (obj->client != cl)
+ return UBUS_STATUS_PERMISSION_DENIED;
+
+ if (!attr[EVREG_PATTERN])
+ return ubusd_alloc_catchall(obj);
+
+ pattern = blobmsg_data(attr[EVREG_PATTERN]);
+ ev = ubusd_alloc_event_source(obj, EVS_PATTERN, strlen(pattern) + 1);
+ ev->pattern.avl.key = (void *) (ev + 1);
+ strcpy(ev->pattern.avl.key, pattern);
+ avl_insert(&patterns, &ev->pattern.avl);
+
+ return 0;
+}
+
+enum {
+ EVMSG_ID,
+ EVMSG_DATA,
+ EVMSG_LAST,
+};
+
+static struct blobmsg_policy ev_policy[] = {
+ [EVMSG_ID] = { .name = "id", .type = BLOBMSG_TYPE_STRING },
+ [EVMSG_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
+};
+
+static void ubusd_send_event_msg(struct ubus_msg_buf **ub, struct ubus_object *obj,
+ const char *id, struct blob_attr *msg)
+{
+ uint32_t *objid_ptr;
+
+ if (*ub) {
+ objid_ptr = blob_data(blob_data((*ub)->data));
+ *objid_ptr = htonl(obj->id.id);
+ } else {
+ blob_buf_init(&b, 0);
+ blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id.id);
+ blob_put_string(&b, UBUS_ATTR_METHOD, id);
+ blob_put(&b, UBUS_ATTR_DATA, blobmsg_data(msg), blobmsg_data_len(msg));
+
+ *ub = ubus_msg_new(b.head, blob_raw_len(b.head), true);
+
+ (*ub)->hdr.type = UBUS_MSG_INVOKE;
+ (*ub)->hdr.peer = 0;
+ }
+ (*ub)->hdr.seq = ++event_seq;
+ ubus_msg_send(obj->client, *ub, false);
+}
+
+static int ubusd_send_event(struct ubus_client *cl, struct blob_attr *msg)
{
- fprintf(stderr, "event: call to method '%s'\n", method);
+ struct ubus_msg_buf *ub = NULL;
+ struct event_source *ev;
+ struct blob_attr *attr[EVMSG_LAST];
+ const char *id;
+
+ blobmsg_parse(ev_policy, EVMSG_LAST, attr, blob_data(msg), blob_len(msg));
+ if (!attr[EVMSG_ID] || !attr[EVMSG_DATA])
+ return UBUS_STATUS_INVALID_ARGUMENT;
+
+ id = blobmsg_data(attr[EVMSG_ID]);
+ list_for_each_entry(ev, &catch_all, catchall.list) {
+ /* do not loop back events */
+ if (ev->obj->client == cl)
+ continue;
+
+ ubusd_send_event_msg(&ub, ev->obj, id, attr[EVMSG_DATA]);
+ }
+
+ if (ub)
+ ubus_msg_free(ub);
+
return 0;
}
+static int ubusd_event_recv(struct ubus_client *cl, const char *method, struct blob_attr *msg)
+{
+ if (!strcmp(method, "register"))
+ return ubusd_alloc_event_pattern(cl, msg);
+
+ if (!strcmp(method, "send"))
+ return ubusd_send_event(cl, msg);
+
+ return UBUS_STATUS_INVALID_COMMAND;
+}
+
void ubusd_event_init(void)
{
ubus_init_string_tree(&patterns, true);
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