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-rw-r--r--bindings/samples/hello3.c2
-rw-r--r--src/afb-api-dbus.c4
-rw-r--r--src/afb-evt.c101
-rw-r--r--src/afb-evt.h5
-rw-r--r--src/afb-export.c2
-rw-r--r--src/afb-proto-ws.c32
-rw-r--r--src/afb-proto-ws.h6
-rw-r--r--src/afb-stub-ws.c8
-rw-r--r--src/afb-ws-json1.c14
-rw-r--r--src/main-afb-client-demo.c4
10 files changed, 139 insertions, 39 deletions
diff --git a/bindings/samples/hello3.c b/bindings/samples/hello3.c
index 1d7c1954..37da6127 100644
--- a/bindings/samples/hello3.c
+++ b/bindings/samples/hello3.c
@@ -424,7 +424,7 @@ static void broadcast(afb_req_t request)
afb_req_success(request, NULL, NULL);
pthread_mutex_unlock(&mutex);
} else if (name != NULL) {
- if (0 > afb_daemon_broadcast_event(name, object))
+ if (0 > afb_daemon_broadcast_event(name, json_object_get(object)))
afb_req_fail(request, "failed", "broadcast error");
else
afb_req_success(request, NULL, NULL);
diff --git a/src/afb-api-dbus.c b/src/afb-api-dbus.c
index 966c9656..ec2ca760 100644
--- a/src/afb-api-dbus.c
+++ b/src/afb-api-dbus.c
@@ -634,7 +634,7 @@ error:
static void afb_api_dbus_server_event_add(void *closure, const char *event, int eventid);
static void afb_api_dbus_server_event_remove(void *closure, const char *event, int eventid);
static void afb_api_dbus_server_event_push(void *closure, const char *event, int eventid, struct json_object *object);
-static void afb_api_dbus_server_event_broadcast(void *closure, const char *event, struct json_object *object);
+static void afb_api_dbus_server_event_broadcast(void *closure, const char *event, struct json_object *object, const char *uuid);
/* the interface for events broadcasting */
static const struct afb_evt_itf evt_broadcast_itf = {
@@ -916,7 +916,7 @@ static void afb_api_dbus_server_event_push(void *closure, const char *event, int
json_object_put(object);
}
-static void afb_api_dbus_server_event_broadcast(void *closure, const char *event, struct json_object *object)
+static void afb_api_dbus_server_event_broadcast(void *closure, const char *event, struct json_object *object, const char *uuid)
{
int rc;
struct api_dbus *api;
diff --git a/src/afb-evt.c b/src/afb-evt.c
index ddad5759..24ac8bee 100644
--- a/src/afb-evt.c
+++ b/src/afb-evt.c
@@ -31,6 +31,7 @@
#include "afb-hook.h"
#include "verbose.h"
#include "jobs.h"
+#include "uuid.h"
struct afb_evt_watch;
@@ -120,6 +121,12 @@ struct job_broadcast
/** object atached to the event */
struct json_object *object;
+ /** the uuid of the event */
+ uuid_binary_t uuid;
+
+ /** remaining hop */
+ uint8_t hop;
+
/** name of the event to broadcast */
char event[];
};
@@ -168,16 +175,39 @@ static struct afb_evtid *evtids = NULL;
static int event_id_counter = 0;
static int event_id_wrapped = 0;
+/* head of uniqueness of events */
+#if !defined(EVENT_BROADCAST_HOP_MAX)
+# define EVENT_BROADCAST_HOP_MAX 10
+#endif
+#if !defined(EVENT_BROADCAST_MEMORY_COUNT)
+# define EVENT_BROADCAST_MEMORY_COUNT 8
+#endif
+
+#if EVENT_BROADCAST_MEMORY_COUNT
+static struct {
+ pthread_mutex_t mutex;
+ uint8_t base;
+ uint8_t count;
+ uuid_binary_t uuids[EVENT_BROADCAST_MEMORY_COUNT];
+} uniqueness = {
+ .mutex = PTHREAD_MUTEX_INITIALIZER,
+ .base = 0,
+ .count = 0
+};
+#endif
+
/*
* Create structure for job of broadcasting string 'event' with 'object'
* Returns the created structure or NULL if out of memory
*/
-static struct job_broadcast *make_job_broadcast(const char *event, struct json_object *object)
+static struct job_broadcast *make_job_broadcast(const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop)
{
size_t sz = 1 + strlen(event);
struct job_broadcast *jb = malloc(sz + sizeof *jb);
if (jb) {
jb->object = object;
+ memcpy(jb->uuid, uuid, sizeof jb->uuid);
+ jb->hop = hop;
memcpy(jb->event, event, sz);
}
return jb;
@@ -219,7 +249,7 @@ static void destroy_job_evtid(struct job_evtid *je)
/*
* Broadcasts the 'event' of 'id' with its 'object'
*/
-static void broadcast(const char *event, struct json_object *object)
+static void broadcast(struct job_broadcast *jb)
{
struct afb_evt_listener *listener;
@@ -227,7 +257,7 @@ static void broadcast(const char *event, struct json_object *object)
listener = listeners;
while(listener) {
if (listener->itf->broadcast != NULL)
- listener->itf->broadcast(listener->closure, event, json_object_get(object));
+ listener->itf->broadcast(listener->closure, jb->event, json_object_get(jb->object), jb->uuid, jb->hop);
listener = listener->next;
}
pthread_rwlock_unlock(&listeners_rwlock);
@@ -241,19 +271,56 @@ static void broadcast_job(int signum, void *closure)
struct job_broadcast *jb = closure;
if (signum == 0)
- broadcast(jb->event, jb->object);
+ broadcast(jb);
destroy_job_broadcast(jb);
}
/*
* Broadcasts the string 'event' with its 'object'
*/
-static int unhooked_broadcast(const char *event, struct json_object *object)
+static int unhooked_broadcast(const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop)
{
+ uuid_binary_t local_uuid;
struct job_broadcast *jb;
int rc;
+#if EVENT_BROADCAST_MEMORY_COUNT
+ int iter, count;
+#endif
+
+ /* check if lately sent */
+ if (!uuid) {
+ uuid_new_binary(local_uuid);
+ uuid = local_uuid;
+ hop = EVENT_BROADCAST_HOP_MAX;
+#if EVENT_BROADCAST_MEMORY_COUNT
+ pthread_mutex_lock(&uniqueness.mutex);
+ } else {
+ pthread_mutex_lock(&uniqueness.mutex);
+ iter = (int)uniqueness.base;
+ count = (int)uniqueness.count;
+ while (count) {
+ if (0 == memcmp(uuid, uniqueness.uuids[iter], sizeof(uuid_binary_t))) {
+ pthread_mutex_unlock(&uniqueness.mutex);
+ return 0;
+ }
+ if (++iter == EVENT_BROADCAST_MEMORY_COUNT)
+ iter = 0;
+ count--;
+ }
+ }
+ iter = (int)uniqueness.base;
+ if (uniqueness.count < EVENT_BROADCAST_MEMORY_COUNT)
+ iter += (int)(uniqueness.count++);
+ else if (++uniqueness.base == EVENT_BROADCAST_MEMORY_COUNT)
+ uniqueness.base = 0;
+ memcpy(uniqueness.uuids[iter], uuid, sizeof(uuid_binary_t));
+ pthread_mutex_unlock(&uniqueness.mutex);
+#else
+ }
+#endif
- jb = make_job_broadcast(event, object);
+ /* create the structure for the job */
+ jb = make_job_broadcast(event, object, uuid, hop);
if (jb == NULL) {
ERROR("Cant't create broadcast string job item for %s(%s)",
event, json_object_to_json_string(object));
@@ -261,6 +328,7 @@ static int unhooked_broadcast(const char *event, struct json_object *object)
return -1;
}
+ /* queue the job */
rc = jobs_queue(BROADCAST_JOB_GROUP, 0, broadcast_job, jb);
if (rc) {
ERROR("cant't queue broadcast string job item for %s(%s)",
@@ -277,7 +345,7 @@ static int unhooked_broadcast(const char *event, struct json_object *object)
*/
int afb_evt_evtid_broadcast(struct afb_evtid *evtid, struct json_object *object)
{
- return unhooked_broadcast(evtid->fullname, object);
+ return unhooked_broadcast(evtid->fullname, object, NULL, 0);
}
/*
@@ -304,12 +372,7 @@ int afb_evt_evtid_hooked_broadcast(struct afb_evtid *evtid, struct json_object *
return result;
}
-/*
- * Broadcasts the 'event' with its 'object'
- * 'object' is released (like json_object_put)
- * Returns the count of listener having receive the event.
- */
-int afb_evt_broadcast(const char *event, struct json_object *object)
+int afb_evt_rebroadcast(const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop)
{
int result;
@@ -318,7 +381,7 @@ int afb_evt_broadcast(const char *event, struct json_object *object)
afb_hook_evt_broadcast_before(event, 0, object);
#endif
- result = unhooked_broadcast(event, object);
+ result = unhooked_broadcast(event, object, uuid, hop);
#if WITH_AFB_HOOK
afb_hook_evt_broadcast_after(event, 0, object, result);
@@ -328,6 +391,16 @@ int afb_evt_broadcast(const char *event, struct json_object *object)
}
/*
+ * Broadcasts the 'event' with its 'object'
+ * 'object' is released (like json_object_put)
+ * Returns the count of listener having receive the event.
+ */
+int afb_evt_broadcast(const char *event, struct json_object *object)
+{
+ return afb_evt_rebroadcast(event, object, NULL, 0);
+}
+
+/*
* Pushes the event 'evtid' with 'obj' to its listeners
* Returns the count of listener that received the event.
*/
diff --git a/src/afb-evt.h b/src/afb-evt.h
index 423bd552..02693e9c 100644
--- a/src/afb-evt.h
+++ b/src/afb-evt.h
@@ -17,6 +17,8 @@
#pragma once
+#include "uuid.h"
+
struct afb_event_x1;
struct afb_event_x2;
struct afb_evtid;
@@ -27,7 +29,7 @@ struct afb_evt_listener;
struct afb_evt_itf
{
void (*push)(void *closure, const char *event, int evtid, struct json_object *object);
- void (*broadcast)(void *closure, const char *event, struct json_object *object);
+ void (*broadcast)(void *closure, const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop);
void (*add)(void *closure, const char *event, int evtid);
void (*remove)(void *closure, const char *event, int evtid);
};
@@ -35,6 +37,7 @@ struct afb_evt_itf
extern struct afb_evt_listener *afb_evt_listener_create(const struct afb_evt_itf *itf, void *closure);
extern int afb_evt_broadcast(const char *event, struct json_object *object);
+extern int afb_evt_rebroadcast(const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop);
extern struct afb_evt_listener *afb_evt_listener_addref(struct afb_evt_listener *listener);
extern void afb_evt_listener_unref(struct afb_evt_listener *listener);
diff --git a/src/afb-export.c b/src/afb-export.c
index de6134d3..c146f7e8 100644
--- a/src/afb-export.c
+++ b/src/afb-export.c
@@ -1183,7 +1183,7 @@ static void listener_of_pushed_events(void *closure, const char *event, int even
listener_of_events(closure, event, eventid, object);
}
-static void listener_of_broadcasted_events(void *closure, const char *event, struct json_object *object)
+static void listener_of_broadcasted_events(void *closure, const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop)
{
listener_of_events(closure, event, 0, object);
}
diff --git a/src/afb-proto-ws.c b/src/afb-proto-ws.c
index f4070860..ea95110a 100644
--- a/src/afb-proto-ws.c
+++ b/src/afb-proto-ws.c
@@ -560,11 +560,12 @@ static void client_on_event_unsubscribe(struct afb_proto_ws *protows, struct rea
/* receives broadcasted events */
static void client_on_event_broadcast(struct afb_proto_ws *protows, struct readbuf *rb)
{
- const char *event_name;
+ const char *event_name, *uuid;
+ char hop;
struct json_object *object;
- if (protows->client_itf->on_event_broadcast && readbuf_string(rb, &event_name, NULL) && readbuf_object(rb, &object))
- protows->client_itf->on_event_broadcast(protows->closure, event_name, object);
+ if (protows->client_itf->on_event_broadcast && readbuf_string(rb, &event_name, NULL) && readbuf_object(rb, &object) && (uuid = readbuf_get(rb, 16)) && readbuf_char(rb, &hop))
+ protows->client_itf->on_event_broadcast(protows->closure, event_name, object, (unsigned char*)uuid, (uint8_t)hop);
else
ERROR("Ignoring broadcast of event");
}
@@ -909,9 +910,9 @@ static int server_event_send(struct afb_proto_ws *protows, char order, const cha
int rc;
if (writebuf_char(&wb, order)
- && (order == CHAR_FOR_EVT_BROADCAST || writebuf_uint32(&wb, event_id))
+ && writebuf_uint32(&wb, event_id)
&& writebuf_string(&wb, event_name)
- && (order == CHAR_FOR_EVT_ADD || order == CHAR_FOR_EVT_DEL || writebuf_object(&wb, data))) {
+ && (order != CHAR_FOR_EVT_PUSH || writebuf_object(&wb, data))) {
pthread_mutex_lock(&protows->mutex);
rc = afb_ws_binary_v(protows->ws, wb.iovec, wb.count);
pthread_mutex_unlock(&protows->mutex);
@@ -936,9 +937,26 @@ int afb_proto_ws_server_event_push(struct afb_proto_ws *protows, const char *eve
return server_event_send(protows, CHAR_FOR_EVT_PUSH, event_name, event_id, data);
}
-int afb_proto_ws_server_event_broadcast(struct afb_proto_ws *protows, const char *event_name, struct json_object *data)
+int afb_proto_ws_server_event_broadcast(struct afb_proto_ws *protows, const char *event_name, struct json_object *data, const unsigned char uuid[16], uint8_t hop)
{
- return server_event_send(protows, CHAR_FOR_EVT_BROADCAST, event_name, 0, data);
+ struct writebuf wb = { .count = 0 };
+ int rc;
+
+ if (!hop--)
+ return 0;
+
+ if (writebuf_char(&wb, CHAR_FOR_EVT_BROADCAST)
+ && writebuf_string(&wb, event_name)
+ && writebuf_object(&wb, data)
+ && writebuf_put(&wb, uuid, 16)
+ && writebuf_char(&wb, (char)hop)) {
+ pthread_mutex_lock(&protows->mutex);
+ rc = afb_ws_binary_v(protows->ws, wb.iovec, wb.count);
+ pthread_mutex_unlock(&protows->mutex);
+ if (rc >= 0)
+ return 0;
+ }
+ return -1;
}
/*****************************************************/
diff --git a/src/afb-proto-ws.h b/src/afb-proto-ws.h
index d797cb6f..df51e6a7 100644
--- a/src/afb-proto-ws.h
+++ b/src/afb-proto-ws.h
@@ -29,6 +29,8 @@ struct afb_proto_ws;
struct afb_proto_ws_call;
struct afb_proto_ws_describe;
+typedef unsigned char afb_proto_ws_uuid_t[16];
+
struct afb_proto_ws_client_itf
{
/* can't be NULL */
@@ -40,7 +42,7 @@ struct afb_proto_ws_client_itf
void (*on_event_subscribe)(void *closure, void *request, const char *event_name, int event_id);
void (*on_event_unsubscribe)(void *closure, void *request, const char *event_name, int event_id);
void (*on_event_push)(void *closure, const char *event_name, int event_id, struct json_object *data);
- void (*on_event_broadcast)(void *closure, const char *event_name, struct json_object *data);
+ void (*on_event_broadcast)(void *closure, const char *event_name, struct json_object *data, const afb_proto_ws_uuid_t uuid, uint8_t hop);
};
struct afb_proto_ws_server_itf
@@ -70,7 +72,7 @@ extern int afb_proto_ws_client_describe(struct afb_proto_ws *protows, void (*cal
extern int afb_proto_ws_server_event_create(struct afb_proto_ws *protows, const char *event_name, int event_id);
extern int afb_proto_ws_server_event_remove(struct afb_proto_ws *protows, const char *event_name, int event_id);
extern int afb_proto_ws_server_event_push(struct afb_proto_ws *protows, const char *event_name, int event_id, struct json_object *data);
-extern int afb_proto_ws_server_event_broadcast(struct afb_proto_ws *protows, const char *event_name, struct json_object *data);
+extern int afb_proto_ws_server_event_broadcast(struct afb_proto_ws *protows, const char *event_name, struct json_object *data, const afb_proto_ws_uuid_t uuid, uint8_t hop);
extern void afb_proto_ws_call_addref(struct afb_proto_ws_call *call);
extern void afb_proto_ws_call_unref(struct afb_proto_ws_call *call);
diff --git a/src/afb-stub-ws.c b/src/afb-stub-ws.c
index 0c440bd5..e900ac76 100644
--- a/src/afb-stub-ws.c
+++ b/src/afb-stub-ws.c
@@ -341,12 +341,12 @@ static void server_event_push_cb(void *closure, const char *event, int eventid,
json_object_put(object);
}
-static void server_event_broadcast_cb(void *closure, const char *event, struct json_object *object)
+static void server_event_broadcast_cb(void *closure, const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop)
{
struct afb_stub_ws *stubws = closure;
if (stubws->proto != NULL)
- afb_proto_ws_server_event_broadcast(stubws->proto, event, object);
+ afb_proto_ws_server_event_broadcast(stubws->proto, event, object, uuid, hop);
json_object_put(object);
}
@@ -457,9 +457,9 @@ static void client_on_event_push_cb(void *closure, const char *event_name, int e
ERROR("unreadable push event");
}
-static void client_on_event_broadcast_cb(void *closure, const char *event_name, struct json_object *data)
+static void client_on_event_broadcast_cb(void *closure, const char *event_name, struct json_object *data, const uuid_binary_t uuid, uint8_t hop)
{
- afb_evt_broadcast(event_name, data);
+ afb_evt_rebroadcast(event_name, data, uuid, hop);
}
/*****************************************************/
diff --git a/src/afb-ws-json1.c b/src/afb-ws-json1.c
index 4f5cb868..5e71ff1f 100644
--- a/src/afb-ws-json1.c
+++ b/src/afb-ws-json1.c
@@ -46,7 +46,7 @@ struct afb_wsreq;
static void aws_on_hangup_cb(void *closure, struct afb_wsj1 *wsj1);
static void aws_on_call_cb(void *closure, const char *api, const char *verb, struct afb_wsj1_msg *msg);
static void aws_on_push_cb(void *closure, const char *event, int eventid, struct json_object *object);
-static void aws_on_broadcast_cb(void *closure, const char *event, struct json_object *object);
+static void aws_on_broadcast_cb(void *closure, const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop);
/* predeclaration of wsreq callbacks */
static void wsreq_destroy(struct afb_xreq *xreq);
@@ -207,15 +207,19 @@ static void aws_on_call_cb(void *closure, const char *api, const char *verb, str
afb_xreq_process(&wsreq->xreq, ws->apiset);
}
+static void aws_on_event(struct afb_ws_json1 *aws, const char *event, struct json_object *object)
+{
+ afb_wsj1_send_event_j(aws->wsj1, event, afb_msg_json_event(event, object));
+}
+
static void aws_on_push_cb(void *closure, const char *event, int eventid, struct json_object *object)
{
- aws_on_broadcast_cb(closure, event, object);
+ aws_on_event(closure, event, object);
}
-static void aws_on_broadcast_cb(void *closure, const char *event, struct json_object *object)
+static void aws_on_broadcast_cb(void *closure, const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop)
{
- struct afb_ws_json1 *aws = closure;
- afb_wsj1_send_event_j(aws->wsj1, event, afb_msg_json_event(event, object));
+ aws_on_event(closure, event, afb_msg_json_event(event, object));
}
/***************************************************************
diff --git a/src/main-afb-client-demo.c b/src/main-afb-client-demo.c
index 1d056365..b772c9d7 100644
--- a/src/main-afb-client-demo.c
+++ b/src/main-afb-client-demo.c
@@ -60,7 +60,7 @@ static void on_pws_event_remove(void *closure, const char *event_name, int event
static void on_pws_event_subscribe(void *closure, void *request, const char *event_name, int event_id);
static void on_pws_event_unsubscribe(void *closure, void *request, const char *event_name, int event_id);
static void on_pws_event_push(void *closure, const char *event_name, int event_id, struct json_object *data);
-static void on_pws_event_broadcast(void *closure, const char *event_name, struct json_object *data);
+static void on_pws_event_broadcast(void *closure, const char *event_name, struct json_object *data, const afb_proto_ws_uuid_t uuid, uint8_t hop);
static void idle();
static int process_stdin();
@@ -522,7 +522,7 @@ static void on_pws_event_push(void *closure, const char *event_name, int event_i
fflush(stdout);
}
-static void on_pws_event_broadcast(void *closure, const char *event_name, struct json_object *data)
+static void on_pws_event_broadcast(void *closure, const char *event_name, struct json_object *data, const afb_proto_ws_uuid_t uuid, uint8_t hop)
{
if (raw)
printf("ON-EVENT-BROADCAST: [%s]\n%s\n", event_name, json_object_to_json_string_ext(data, JSON_C_TO_STRING_NOSLASHESCAPE));