static void
buildHandshakeMessage( tr_handshake * handshake, uint8_t * buf )
{
uint8_t * walk = buf;
const uint8_t * torrentHash = tr_cryptoGetTorrentHash( handshake->crypto );
const tr_torrent * tor = tr_torrentFindFromHash( handshake->session, torrentHash );
const uint8_t * peer_id = tor && tor->peer_id ? tor->peer_id : tr_getPeerId( );
memcpy( walk, HANDSHAKE_NAME, HANDSHAKE_NAME_LEN );
walk += HANDSHAKE_NAME_LEN;
memset( walk, 0, HANDSHAKE_FLAGS_LEN );
HANDSHAKE_SET_LTEP( walk );
HANDSHAKE_SET_FASTEXT( walk );
/* Note that this doesn't depend on whether the torrent is private.
* We don't accept DHT peers for a private torrent,
* but we participate in the DHT regardless. */
if( tr_dhtEnabled( handshake->session ) )
HANDSHAKE_SET_DHT( walk );
walk += HANDSHAKE_FLAGS_LEN;
memcpy( walk, torrentHash, SHA_DIGEST_LENGTH );
walk += SHA_DIGEST_LENGTH;
memcpy( walk, peer_id, PEER_ID_LEN );
walk += PEER_ID_LEN;
assert( strlen( ( const char* )peer_id ) == PEER_ID_LEN );
assert( walk - buf == HANDSHAKE_SIZE );
}
static bool
buildHandshakeMessage (tr_handshake * handshake, uint8_t * buf)
{
const unsigned char * peer_id = NULL;
const uint8_t * torrentHash;
tr_torrent * tor;
bool success;
if ((torrentHash = tr_cryptoGetTorrentHash (handshake->crypto)))
if ((tor = tr_torrentFindFromHash (handshake->session, torrentHash)))
peer_id = tr_torrentGetPeerId (tor);
if (peer_id == NULL)
{
success = false;
}
else
{
uint8_t * walk = buf;
memcpy (walk, HANDSHAKE_NAME, HANDSHAKE_NAME_LEN);
walk += HANDSHAKE_NAME_LEN;
memset (walk, 0, HANDSHAKE_FLAGS_LEN);
HANDSHAKE_SET_LTEP (walk);
HANDSHAKE_SET_FASTEXT (walk);
/* Note that this doesn't depend on whether the torrent is private.
* We don't accept DHT peers for a private torrent,
* but we participate in the DHT regardless. */
if (tr_dhtEnabled (handshake->session))
HANDSHAKE_SET_DHT (walk);
walk += HANDSHAKE_FLAGS_LEN;
memcpy (walk, torrentHash, SHA_DIGEST_LENGTH);
walk += SHA_DIGEST_LENGTH;
memcpy (walk, peer_id, PEER_ID_LEN);
walk += PEER_ID_LEN;
assert (walk - buf == HANDSHAKE_SIZE);
success = true;
}
return success;
}