-/* Copyright (c) 2012. The SimGrid Team.
+/* Copyright (c) 2012-2016. The SimGrid Team.
* All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
#ifndef BITTORRENT_MESSAGES_H_
#define BITTORRENT_MESSAGES_H_
-#include <msg/msg.h>
-/**
- * Types of messages exchanged between two peers.
+#include <simgrid/msg.h>
+
+/** Message sizes
+ * Sizes based on report by A. Legout et al, Understanding BitTorrent: An Experimental Perspective
+ * http://hal.inria.fr/inria-00000156/en
*/
+#define MESSAGE_HANDSHAKE_SIZE 68
+#define MESSAGE_CHOKE_SIZE 5
+#define MESSAGE_UNCHOKE_SIZE 5
+#define MESSAGE_INTERESTED_SIZE 5
+#define MESSAGE_NOTINTERESTED_SIZE 5
+#define MESSAGE_HAVE_SIZE 9
+#define MESSAGE_BITFIELD_SIZE 5
+#define MESSAGE_REQUEST_SIZE 17
+#define MESSAGE_PIECE_SIZE 13
+#define MESSAGE_CANCEL_SIZE 17
+
+/** Types of messages exchanged between two peers. */
typedef enum {
MESSAGE_HANDSHAKE,
MESSAGE_CHOKE,
MESSAGE_HAVE,
MESSAGE_BITFIELD,
MESSAGE_REQUEST,
- MESSAGE_PIECE
+ MESSAGE_PIECE,
+ MESSAGE_CANCEL
} e_message_type;
-/**
- * Message data
- */
+/** Message data */
typedef struct s_message {
e_message_type type;
const char *mailbox;
int index;
int block_index;
int block_length;
- int stalled:1;
} s_message_t, *message_t;
-/**
- * Builds a new value-less message
- */
-msg_task_t task_message_new(e_message_type type,
- const char *issuer_host_name,
- const char *mailbox, int peer_id);
-/**
- * Builds a new "have/piece" message
- */
-msg_task_t task_message_index_new(e_message_type type,
- const char *issuer_host_name,
- const char *mailbox, int peer_id,
- int index);
-/**
- * Builds a new bitfield message
- */
-msg_task_t task_message_bitfield_new(const char *issuer_host_name,
- const char *mailbox, int peer_id,
- char *bitfield);
-/**
- * Builds a new "request" message
- */
-msg_task_t task_message_request_new(const char *issuer_host_name,
- const char *mailbox, int peer_id, int index,
- int block_index, int block_length);
-/**
- * Build a new "piece" message
- */
-msg_task_t task_message_piece_new(const char *issuer_host_name,
- const char *mailbox, int peer_id, int index,
- int stalled, int block_index,
- int block_length);
-/**
- * Free a message task
- */
+/** Builds a new value-less message */
+msg_task_t task_message_new(e_message_type type, const char *issuer_host_name, const char *mailbox, int peer_id,
+ int size);
+/** Builds a new "have/piece" message */
+msg_task_t task_message_index_new(e_message_type type, const char *issuer_host_name, const char *mailbox, int peer_id,
+ int index, int varsize);
+/** Builds a new bitfield message */
+msg_task_t task_message_bitfield_new(const char *issuer_host_name, const char *mailbox, int peer_id, char *bitfield,
+ int bitfield_size);
+/** Builds a new "request" message */
+msg_task_t task_message_request_new(const char *issuer_host_name, const char *mailbox, int peer_id, int index,
+ int block_index, int block_length);
+/** Build a new "piece" message */
+msg_task_t task_message_piece_new(const char *issuer_host_name, const char *mailbox, int peer_id, int index,
+ int block_index, int block_length, int block_size);
+/** Free a message task */
void task_message_free(void *);
+int task_message_size(e_message_type type);
+
#endif /* BITTORRENT_MESSAGES_H_ */