diff --git a/src/kernel/Communicator.cc b/src/kernel/Communicator.cc
index eb8ce4b8..a3a6deeb 100644
--- a/src/kernel/Communicator.cc
+++ b/src/kernel/Communicator.cc
@@ -119,6 +119,35 @@ static int __create_ssl(SSL_CTX *ssl_ctx, struct CommConnEntry *entry)
 	return -1;
 }
 
+static int __send_to_conn(const void *buf, size_t size,
+						  struct CommConnEntry *entry)
+{
+	const struct sockaddr *addr;
+	socklen_t addrlen;
+	int ret;
+
+	if (!entry->ssl)
+	{
+		entry->target->get_addr(&addr, &addrlen);
+		return sendto(entry->sockfd, buf, size, 0, addr, addrlen);
+	}
+
+	if (size == 0)
+		return 0;
+
+	ret = SSL_write(entry->ssl, buf, size);
+	if (ret <= 0)
+	{
+		ret = SSL_get_error(entry->ssl, ret);
+		if (ret != SSL_ERROR_SYSCALL)
+			errno = -ret;
+
+		ret = -1;
+	}
+
+	return ret;
+}
+
 static void __release_conn(struct CommConnEntry *entry)
 {
 	delete entry->conn;
@@ -199,7 +228,7 @@ void CommTarget::deinit()
 
 int CommMessageIn::feedback(const void *buf, size_t size)
 {
-	return this->entry->session->push(buf, size, this->entry);
+	return __send_to_conn(buf, size, this->entry);
 }
 
 void CommMessageIn::renew()
@@ -300,7 +329,7 @@ public:
 	}
 
 public:
-	int shutdown(int reliable);
+	int shutdown();
 
 private:
 	int sockfd;
@@ -319,7 +348,7 @@ private:
 	friend class Communicator;
 };
 
-int CommServiceTarget::shutdown(int reliable)
+int CommServiceTarget::shutdown()
 {
 	struct CommConnEntry *entry;
 	int errno_bak;
@@ -331,7 +360,7 @@ int CommServiceTarget::shutdown(int reliable)
 		entry = list_entry(this->idle_list.next, struct CommConnEntry, list);
 		list_del(&entry->list);
 
-		if (reliable)
+		if (this->service->reliable)
 		{
 			errno_bak = errno;
 			mpoller_del(entry->sockfd, entry->mpoller);
@@ -351,37 +380,6 @@ int CommServiceTarget::shutdown(int reliable)
 	return ret;
 }
 
-int CommSession::push(const void *buf, size_t size, struct CommConnEntry *entry)
-{
-	const struct sockaddr *addr;
-	socklen_t addrlen;
-	int ret;
-
-	if (this->passive && !this->reliable)
-	{
-		entry->target->get_addr(&addr, &addrlen);
-		return sendto(entry->sockfd, buf, size, 0, addr, addrlen);
-	}
-
-	if (!entry->ssl)
-		return write(entry->sockfd, buf, size);
-
-	if (size == 0)
-		return 0;
-
-	ret = SSL_write(entry->ssl, buf, size);
-	if (ret <= 0)
-	{
-		ret = SSL_get_error(entry->ssl, ret);
-		if (ret != SSL_ERROR_SYSCALL)
-			errno = -ret;
-
-		ret = -1;
-	}
-
-	return ret;
-}
-
 CommSession::~CommSession()
 {
 	CommServiceTarget *target;
@@ -391,7 +389,7 @@ CommSession::~CommSession()
 
 	target = (CommServiceTarget *)this->target;
 	if (this->passive == 1)
-		target->shutdown(this->reliable);
+		target->shutdown();
 
 	target->decref();
 }
@@ -1372,7 +1370,6 @@ poller_message_t *Communicator::create_request(void *context)
 		return NULL;
 
 	session->passive = 1;
-	session->reliable = 1;
 	entry->session = session;
 	session->target = target;
 	session->conn = entry->conn;
@@ -1439,7 +1436,6 @@ int Communicator::recv_request(const void *buf, size_t size,
 		return -1;
 
 	session->passive = 1;
-	session->reliable = 0;
 	entry->session = session;
 	session->target = target;
 	session->conn = entry->conn;
@@ -1815,7 +1811,7 @@ int Communicator::request(CommSession *session, CommTarget *target)
 	return 0;
 }
 
-int Communicator::nonblock_listen(CommService *service, int *reliable)
+int Communicator::nonblock_listen(CommService *service)
 {
 	int sockfd = service->create_listen_fd();
 	int ret;
@@ -1830,7 +1826,7 @@ int Communicator::nonblock_listen(CommService *service, int *reliable)
 				ret = listen(sockfd, SOMAXCONN);
 				if (ret >= 0 || errno == EOPNOTSUPP)
 				{
-					*reliable = (ret >= 0);
+					service->reliable = (ret >= 0);
 					return sockfd;
 				}
 			}
@@ -1846,10 +1842,9 @@ int Communicator::bind(CommService *service)
 {
 	struct poller_data data;
 	int errno_bak = errno;
-	int reliable;
 	int sockfd;
 
-	sockfd = this->nonblock_listen(service, &reliable);
+	sockfd = this->nonblock_listen(service);
 	if (sockfd >= 0)
 	{
 		service->listen_fd = sockfd;
@@ -1857,7 +1852,7 @@ int Communicator::bind(CommService *service)
 		data.fd = sockfd;
 		data.context = service;
 		data.result = NULL;
-		if (reliable)
+		if (service->reliable)
 		{
 			data.operation = PD_OP_LISTEN;
 			data.accept = Communicator::accept;
@@ -1987,7 +1982,7 @@ int Communicator::reply_unreliable(CommSession *session, CommTarget *target)
 int Communicator::reply(CommSession *session)
 {
 	struct CommConnEntry *entry;
-	CommTarget *target;
+	CommServiceTarget *target;
 	int errno_bak;
 	int ret;
 
@@ -1999,8 +1994,8 @@ int Communicator::reply(CommSession *session)
 
 	errno_bak = errno;
 	session->passive = 2;
-	target = session->target;
-	if (session->reliable)
+	target = (CommServiceTarget *)session->target;
+	if (target->service->reliable)
 		ret = this->reply_idle_conn(session, target);
 	else
 		ret = this->reply_unreliable(session, target);
@@ -2038,7 +2033,7 @@ int Communicator::push(const void *buf, size_t size, CommSession *session)
 	if (!list_empty(&target->idle_list))
 	{
 		entry = list_entry(target->idle_list.next, struct CommConnEntry, list);
-		ret = session->push(buf, size, entry);
+		ret = __send_to_conn(buf, size, entry);
 	}
 	else
 	{
@@ -2062,7 +2057,7 @@ int Communicator::shutdown(CommSession *session)
 
 	session->passive = 2;
 	target = (CommServiceTarget *)session->target;
-	if (!target->shutdown(session->reliable))
+	if (!target->shutdown())
 	{
 		errno = ENOENT;
 		return -1;
diff --git a/src/kernel/Communicator.h b/src/kernel/Communicator.h
index dec78ad6..05e1a662 100644
--- a/src/kernel/Communicator.h
+++ b/src/kernel/Communicator.h
@@ -157,11 +157,7 @@ private:
 private:
 	struct timespec begin_time;
 	int timeout;
-	char passive;
-	char reliable;
-
-private:
-	int push(const void *buf, size_t size, struct CommConnEntry *entry);
+	int passive;
 
 public:
 	CommSession() { this->passive = 0; }
@@ -226,6 +222,7 @@ private:
 	void decref();
 
 private:
+	int reliable;
 	int listen_fd;
 	int ref;
 
@@ -344,7 +341,7 @@ private:
 	static void handler_thread_routine(void *context);
 
 	static int nonblock_connect(CommTarget *target);
-	static int nonblock_listen(CommService *service, int *reliable);
+	static int nonblock_listen(CommService *service);
 
 	static struct CommConnEntry *launch_conn(CommSession *session,
 											 CommTarget *target);