#ifndef BITTORRENT_MESSAGES_H_
#define BITTORRENT_MESSAGES_H_
#include <msg/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_UNCHOKE,
- MESSAGE_INTERESTED,
- MESSAGE_NOTINTERESTED,
- MESSAGE_HAVE,
- MESSAGE_BITFIELD,
- MESSAGE_REQUEST,
- MESSAGE_PIECE
+ MESSAGE_HANDSHAKE,
+ MESSAGE_CHOKE,
+ MESSAGE_UNCHOKE,
+ MESSAGE_INTERESTED,
+ MESSAGE_NOTINTERESTED,
+ MESSAGE_HAVE,
+ MESSAGE_BITFIELD,
+ MESSAGE_REQUEST,
+ MESSAGE_PIECE,
+ MESSAGE_CANCEL
} e_message_type;
/**
* Message data
*/
typedef struct s_message {
- e_message_type type;
- const char *mailbox;
- const char *issuer_host_name;
- int peer_id;
- char *bitfield;
- int index;
- int block_index;
- int block_length;
- int stalled:1;
+ e_message_type type;
+ const char *mailbox;
+ const char *issuer_host_name;
+ int peer_id;
+ char *bitfield;
+ int index;
+ int block_index;
+ int block_length;
+ int stalled:1;
} s_message_t, *message_t;
/**
* Builds a new value-less message
*/
-XBT_INLINE msg_task_t task_message_new(e_message_type type, const char *issuer_host_name, const char *mailbox, int peer_id);
+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
*/
-XBT_INLINE msg_task_t task_message_index_new(e_message_type type, const char *issuer_host_name, const char *mailbox, int peer_id, int index);
+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);
+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);
+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);
+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, int block_size);
/**
* Free a message task
*/
-void task_message_free(void*);
+void task_message_free(void *);
+
+int task_message_size(e_message_type type);
#endif /* BITTORRENT_MESSAGES_H_ */
