1 /* Copyright (c) 2012. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "bittorrent.h"
9 XBT_LOG_NEW_DEFAULT_CATEGORY(msg_messages,
10 "Messages specific for the message factory");
12 #define BITS_TO_BYTES(x) ((x / 8) + (x % 8) ? 1 : 0)
15 * Build a new empty message
16 * @param type type of the message
17 * @param issuer_host_name hostname of the issuer, for debuging purposes
18 * @param mailbox mailbox where the peer should answer
19 * @param peer_id id of the issuer
20 * @param size message size in bytes
22 msg_task_t task_message_new(e_message_type type, const char *issuer_host_name,
23 const char *mailbox, int peer_id, int size)
25 message_t message = xbt_new(s_message_t, 1);
26 message->issuer_host_name = issuer_host_name;
27 message->peer_id = peer_id;
28 message->mailbox = mailbox;
30 msg_task_t task = MSG_task_create(NULL, 0, size, message);
31 XBT_DEBUG("type: %d size: %d", (int) type, size);
36 * Builds a message containing an index.
38 msg_task_t task_message_index_new(e_message_type type,
39 const char *issuer_host_name,
40 const char *mailbox, int peer_id,
41 int index, int varsize)
43 msg_task_t task = task_message_new(type, issuer_host_name, mailbox, peer_id,
44 task_message_size(type) + varsize);
45 message_t message = MSG_task_get_data(task);
46 message->index = index;
50 msg_task_t task_message_bitfield_new(const char *issuer_host_name,
51 const char *mailbox, int peer_id,
52 char *bitfield, int bitfield_size)
55 task_message_new(MESSAGE_BITFIELD, issuer_host_name, mailbox, peer_id,
56 task_message_size(MESSAGE_BITFIELD) +
57 /* Size of bitfield in bytes */
58 BITS_TO_BYTES(bitfield_size));
59 message_t message = MSG_task_get_data(task);
60 message->bitfield = bitfield;
64 msg_task_t task_message_request_new(const char *issuer_host_name,
65 const char *mailbox, int peer_id,
66 int index, int block_index,
70 task_message_index_new(MESSAGE_REQUEST, issuer_host_name, mailbox,
72 message_t message = MSG_task_get_data(task);
73 message->block_index = block_index;
74 message->block_length = block_length;
78 msg_task_t task_message_piece_new(const char *issuer_host_name,
79 const char *mailbox, int peer_id, int index,
81 int block_length, int block_size)
84 task_message_index_new(MESSAGE_PIECE, issuer_host_name, mailbox, peer_id,
85 index, block_length * block_size);
86 message_t message = MSG_task_get_data(task);
87 message->block_index = block_index;
88 message->block_length = block_length;
92 void task_message_free(void *task)
94 message_t message = MSG_task_get_data(task);
96 MSG_task_destroy(task);
99 int task_message_size(e_message_type type)
103 case MESSAGE_HANDSHAKE:
104 size = MESSAGE_HANDSHAKE_SIZE;
107 size = MESSAGE_CHOKE_SIZE;
109 case MESSAGE_UNCHOKE:
110 size = MESSAGE_UNCHOKE_SIZE;
112 case MESSAGE_INTERESTED:
113 size = MESSAGE_INTERESTED_SIZE;
115 case MESSAGE_NOTINTERESTED:
116 size = MESSAGE_INTERESTED_SIZE;
119 size = MESSAGE_HAVE_SIZE;
121 case MESSAGE_BITFIELD:
122 size = MESSAGE_BITFIELD_SIZE;
124 case MESSAGE_REQUEST:
125 size = MESSAGE_REQUEST_SIZE;
128 size = MESSAGE_PIECE_SIZE;
131 size = MESSAGE_CANCEL_SIZE;