1 files changed, 155 insertions, 0 deletions
diff --git a/src/charon/network/sender.c b/src/charon/network/sender.c
new file mode 100644
index 000000000..933b8c192
--- /dev/null
+++ b/src/charon/network/sender.c
@@ -0,0 +1,155 @@
+/**
+ * @file sender.c
+ *
+ * @brief Implementation of sender_t.
+ *
+ */
+
+/*
+ * Copyright (C) 2005-2006 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include <stdlib.h>
+#include <pthread.h>
+
+#include "sender.h"
+
+#include <daemon.h>
+#include <network/socket.h>
+
+
+typedef struct private_sender_t private_sender_t;
+
+/**
+ * Private data of a sender_t object.
+ */
+struct private_sender_t {
+	/**
+	 * Public part of a sender_t object.
+	 */
+	 sender_t public;
+
+	 /**
+	  * Assigned thread.
+	  */
+	 pthread_t assigned_thread;
+	 
+	/**
+	 * The packets are stored in a linked list
+	 */
+	linked_list_t *list;
+
+	/**
+	 * mutex to synchronize access to list
+	 */
+	pthread_mutex_t mutex;
+
+	/**
+	 * condvar to signal for packets in list
+	 */
+	pthread_cond_t condvar;
+};
+
+/**
+ * implements sender_t.send
+ */
+static void send_(private_sender_t *this, packet_t *packet)
+{
+	host_t *src, *dst;
+	
+	src = packet->get_source(packet);
+	dst = packet->get_destination(packet);
+	DBG1(DBG_NET, "sending packet: from %#H to %#H", src, dst);
+	
+	pthread_mutex_lock(&this->mutex);
+	this->list->insert_last(this->list, packet);
+	pthread_mutex_unlock(&this->mutex);
+	pthread_cond_signal(&this->condvar);
+}
+
+/**
+ * Implementation of private_sender_t.send_packets.
+ */
+static void send_packets(private_sender_t * this)
+{
+	/* cancellation disabled by default */
+	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
+	DBG1(DBG_NET, "sender thread running, thread_ID: %06u", (int)pthread_self());
+	
+	charon->drop_capabilities(charon, TRUE);
+
+	while (TRUE)
+	{
+		packet_t *packet;
+		int oldstate;
+	
+		pthread_mutex_lock(&this->mutex);
+		/* go to wait while no packets available */
+		while (this->list->get_count(this->list) == 0)
+		{
+			/* add cleanup handler, wait for packet, remove cleanup handler */
+			pthread_cleanup_push((void(*)(void*))pthread_mutex_unlock, (void*)&this->mutex);
+			pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &oldstate);
+			pthread_cond_wait(&this->condvar, &this->mutex);
+			
+			pthread_setcancelstate(oldstate, NULL);
+			pthread_cleanup_pop(0);
+		}
+		this->list->remove_first(this->list, (void**)&packet);
+		pthread_mutex_unlock(&this->mutex);
+		
+		charon->socket->send(charon->socket, packet);
+		packet->destroy(packet);
+	}
+}
+
+/**
+ * Implementation of sender_t.destroy.
+ */
+static void destroy(private_sender_t *this)
+{
+	/* send all packets in the queue */
+	while (this->list->get_count(this->list))
+	{
+		sched_yield();
+	}
+	pthread_cancel(this->assigned_thread);
+	pthread_join(this->assigned_thread, NULL);
+	this->list->destroy(this->list);
+	free(this);
+}
+
+/*
+ * Described in header.
+ */
+sender_t * sender_create()
+{
+	private_sender_t *this = malloc_thing(private_sender_t);
+
+	this->public.send = (void(*)(sender_t*,packet_t*))send_;
+	this->public.destroy = (void(*)(sender_t*)) destroy;
+
+	this->list = linked_list_create();
+	pthread_mutex_init(&this->mutex, NULL);
+	pthread_cond_init(&this->condvar, NULL);
+
+	if (pthread_create(&this->assigned_thread, NULL,
+					   (void*)send_packets, this) != 0)
+	{
+		charon->kill(charon, "unable to create sender thread");
+	}
+
+	return &(this->public);
+}