[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[GNUnet-SVN] r19082 - gnunet/src/stream
From: |
gnunet |
Subject: |
[GNUnet-SVN] r19082 - gnunet/src/stream |
Date: |
Wed, 11 Jan 2012 00:18:38 +0100 |
Author: harsha
Date: 2012-01-11 00:18:38 +0100 (Wed, 11 Jan 2012)
New Revision: 19082
Added:
gnunet/src/stream/stream_protocol.h
Log:
stream P2P protocol message specification
Added: gnunet/src/stream/stream_protocol.h
===================================================================
--- gnunet/src/stream/stream_protocol.h (rev 0)
+++ gnunet/src/stream/stream_protocol.h 2012-01-10 23:18:38 UTC (rev 19082)
@@ -0,0 +1,190 @@
+/*
+ This file is part of GNUnet.
+ (C) 2012 Christian Grothoff (and other contributing authors)
+
+ GNUnet 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 3, or (at your
+ option) any later version.
+
+ GNUnet 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.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file stream/stream_protocol.h
+ * @brief P2P protocol for the stream connections
+ * @author Sree Harsha Totakura
+ */
+
+#ifndef STREAM_PROTOCOL_H
+#define STREAM_PROTOCOL_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#if 0 /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+#include <sys/types.h>
+
+#include "gnunet_stream_lib.h"
+#include "gnunet_mesh_service.h"
+
+
+/**
+ * Stream message types
+ */
+enum GNUNET_STREAM_MessageType
+ {
+ /**
+ * Message containing data
+ */
+ GNUNET_STREAM_MESSAGE_DATA,
+
+ /**
+ * ACK message
+ */
+ GNUNET_STREAM_MESSAGE_ACK,
+
+ /**
+ * Handshake hello message
+ */
+ GNUNET_STREAM_MESSAGE_HELLO,
+
+ /**
+ * Handshake hello acknowledgement message
+ */
+ GNUNET_STREAM_MESSAGE_HELLO_ACK,
+
+ /**
+ * Transmit close message (data transmission no longer possible after this
+ * message)
+ */
+ GNUNET_STREAM_MESSAGE_TRANSMIT_CLOSE,
+
+ /**
+ * Transmit close acknowledgement message
+ */
+ GNUNET_STREAM_MESSAGE_TRANSMIT_CLOSE_ACK,
+
+ /**
+ * Receive close message (data is no loger read by the receiver after this
+ * message)
+ */
+ GNUNET_STREAM_MESSAGE_RECEIVE_CLOSE,
+
+ /**
+ * Receive close acknowledgement message
+ */
+ GNUNET_STREAM_MESSAGE_RECEIVE_CLOSE_ACK,
+
+ /**
+ * Stream close message (data is no longer sent or read after this message)
+ */
+ GNUNET_STREAM_MESSAGE_CLOSE,
+
+ /**
+ * Close acknowledgement message
+ */
+ GNUNET_STREAM_MESSAGE_CLOSE_ACK
+ };
+
+
+/**
+ * The stream message header
+ *
+ * The message can be of Data, Acknowledgement or both
+ */
+struct GNUNET_STREAM_MessageHeader
+{
+ /**
+ * The GNUNET message header
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * A number which identifies a session
+ */
+ uint16_t session_id;
+
+ /**
+ * The message type
+ * ? Should we rather use the type field in GNUNET_MessageHeader ?
+ */
+ enum GNUNET_STREAM_MessageType type;
+
+};
+
+
+/**
+ * The Data message, should be prefixed with stream header with its type set to
+ * GNUNET_STREAM_Data
+ */
+struct GNUNET_STREAM_DataMessage
+{
+ /**
+ * Sequence number; Always starts with 0 and should wrap around.
+ * Immune to Sequence Prediction Attack as we take cover under GNUNET's
secure
+ * messaging
+ */
+ uint32_t seq;
+
+ /**
+ * number of milliseconds to the soft deadline for sending acknowledgement
+ * measured from the time this message is received. It is optimal for the
+ * communication to send the ack within the soft deadline
+ */
+ uint16_t ack_deadline;
+
+ /**
+ * The data should be appended here
+ */
+};
+
+/**
+ * The Selective Acknowledgement Bitmap
+ *
+ * ? WARNING ? Possibility for Denial of Service ??
+ * ? Receiver may force the sender to mantain a buffer of ~ 64*64k !??
+ */
+typedef uint64_t GNUNET_STREAM_AckBitmap;
+
+
+/**
+ * The Acknowledgment Message, should be prefixed with Stream Message header
+ * with its type set to GNUNET_STREAM_MESSAGE_ACK
+ */
+struct GNUNET_STREAM_AckMessage
+{
+ /**
+ * The sequence number of the Data Message upto which the receiver has filled
+ * its buffer without any missing packets
+ */
+ uint32_t base_seq;
+
+ /**
+ * The Selective Acknowledgement Bitmap. Computed relative to the base_seq
+ * (bit n corresponds to the Data message with sequence number base_seq+n)
+ */
+ GNUNET_STREAM_AckBitmap bitmap;
+};
+
+
+#if 0 /** keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* STREAM_PROTOCOL_H */
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- [GNUnet-SVN] r19082 - gnunet/src/stream,
gnunet <=