FS-3612 --resolve cool, thanks

libs/libdingaling/src/libdingaling.c

@@ -1431,12 +1431,14 @@ static void j_setup_filter(ldl_handle_t *handle)
 	}
 }
 
-static void ldl_flush_queue(ldl_handle_t *handle, int done)
+static ldl_queue_t ldl_flush_queue(ldl_handle_t *handle, int done)
 {
 	iks *msg;
 	void *pop = NULL;
 	unsigned int len = 0, x = 0;
 
+	ldl_queue_t sent_data = LDL_QUEUE_NONE;
+
 	apr_thread_mutex_lock(handle->lock);
 
 	while(apr_queue_trypop(handle->queue, &pop) == APR_SUCCESS) {
@@ -1445,6 +1447,7 @@ static void ldl_flush_queue(ldl_handle_t *handle, int done)
 			if (!done) iks_send(handle->parser, msg);
 			iks_delete(msg);
 			pop = NULL;
+			sent_data = LDL_QUEUE_SENT;
 		} else {
 			break;
 		}
@@ -1473,6 +1476,7 @@ static void ldl_flush_queue(ldl_handle_t *handle, int done)
 					}
 					iks_send(handle->parser, packet_node->xml);
 					packet_node->next = now + 5000000;
+					sent_data = LDL_QUEUE_SENT;
 				}
 			}
 			if (packet_node->retries == 0 || done) {
@@ -1490,17 +1494,22 @@ static void ldl_flush_queue(ldl_handle_t *handle, int done)
 		}
 	}
 	apr_thread_mutex_unlock(handle->lock);
+	return sent_data;
 }
 
 
 static void *APR_THREAD_FUNC queue_thread(apr_thread_t *thread, void *obj)
 {
 	ldl_handle_t *handle = (ldl_handle_t *) obj;
+	int timeout_ka = LDL_KEEPALIVE_TIMEOUT;
+	int count_ka = timeout_ka;
 
 	ldl_set_flag_locked(handle, LDL_FLAG_QUEUE_RUNNING);
 
 	while (ldl_test_flag(handle, LDL_FLAG_RUNNING) && !ldl_test_flag(handle, LDL_FLAG_QUEUE_STOP)) {
-		ldl_flush_queue(handle, 0);
+		if (ldl_flush_queue(handle, 0) == LDL_QUEUE_SENT) {
+			count_ka = timeout_ka;
+		};
 
 		if (handle->loop_callback(handle) != LDL_STATUS_SUCCESS || !ldl_test_flag((&globals), LDL_FLAG_READY)) {
 			int fd;
@@ -1511,6 +1520,13 @@ static void *APR_THREAD_FUNC queue_thread(apr_thread_t *thread, void *obj)
 			ldl_set_flag_locked(handle, LDL_FLAG_BREAK);	
 			break;
 		}
+
+		if (count_ka-- <= 0) {
+			if( iks_send_raw(handle->parser, " ") == IKS_OK) {
+				count_ka = timeout_ka;
+				globals.logger(DL_LOG_DEBUG, "Sent keep alive signal\n");
+			}
+		}
 		microsleep(100);
 	}
 	
@@ -1618,6 +1634,7 @@ static void xmpp_connect(ldl_handle_t *handle, char *jabber_id, char *pass)
 				ldl_flush_queue(handle, 0);
 			}
 
+			handle->counter--;
 			if (!ldl_test_flag(handle, LDL_FLAG_CONNECTED)) {
 				if (IKS_NET_TLSFAIL == e) {
 					globals.logger(DL_LOG_DEBUG, "tls handshake failed\n");

libs/libdingaling/src/libdingaling.h

@@ -64,6 +64,8 @@ extern "C" {
 #define LDL_MAX_PAYLOADS 50
 #define LDL_RETRY 3
 #define IKS_NS_COMPONENT "jabber:component:accept"
+/* period between keep alive signals in 0.1sec units*/
+#define LDL_KEEPALIVE_TIMEOUT 6000
 
 /*! \brief A structure to store a jingle candidate */
 struct ldl_candidate {
@@ -173,6 +175,11 @@ typedef enum {
 	LDL_DESCRIPTION_ACCEPT
 } ldl_description_t;
 
+typedef enum {
+	LDL_QUEUE_NONE,
+	LDL_QUEUE_SENT
+} ldl_queue_t;
+
 #define DL_PRE __FILE__, __LDL_FUNC__, __LINE__
 #define DL_LOG_DEBUG DL_PRE, 7
 #define DL_LOG_INFO DL_PRE, 6