def handle_natneg_address_check(nn, recv_data, addr, socket):
"""Command: 0x0A - NN_ADDRESS_CHECK.
Send by the client during connection test.
Example:
fd fc 1e 66 6a b2 03 0a 00 00 00 00 01 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00
Description:
fd fc 1e 66 6a b2 - NATNEG magic
03 - NATNEG version
0a - NATNEG record type
00 00 00 00 - Session id
01 - Port type (between 0x00 and 0x03)
- 60 bytes padding?
00 - Client index (0x00 - Client,
0x01 - Host)
00 - NATNEG result?
00 00 00 00 - NAT type?
00 00 00 00 - NAT mapping scheme?
00 (x50) - Game name?
"""
client_id = "%02x" % ord(recv_data[13])
logger.log(logging.DEBUG,
"Received address check command from %s:%d...",
*addr)
logger.log(logging.DEBUG, "%s", utils.pretty_print_hex(recv_data))
output = bytearray(recv_data[0:15])
output += utils.get_bytes_from_ip_str(addr[0])
output += utils.get_bytes_from_short(addr[1], True)
output += bytearray(recv_data[len(output):])
output[7] = 0x0b # NN_ADDRESS_REPLY
nn.write_queue.put((output, addr, socket))
logger.log(logging.DEBUG, "Sent address check response to %s:%d...", *addr)
logger.log(logging.DEBUG, "%s", utils.pretty_print_hex(output))
def handle_natneg_address_check(nn, recv_data, addr, socket):
"""Command: 0x0A - NN_ADDRESS_CHECK.
Send by the client during connection test.
Example:
fd fc 1e 66 6a b2 03 0a 00 00 00 00 01 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00
Description:
fd fc 1e 66 6a b2 - NATNEG magic
03 - NATNEG version
0a - NATNEG record type
00 00 00 00 - Session id
01 - Port type (between 0x00 and 0x03)
- 60 bytes padding?
00 - Client index (0x00 - Client,
0x01 - Host)
00 - NATNEG result?
00 00 00 00 - NAT type?
00 00 00 00 - NAT mapping scheme?
00 (x50) - Game name?
"""
client_id = "%02x" % ord(recv_data[13])
logger.log(logging.DEBUG, "Received address check command from %s:%d...",
*addr)
logger.log(logging.DEBUG, "%s", utils.pretty_print_hex(recv_data))
output = bytearray(recv_data[0:15])
output += utils.get_bytes_from_ip_str(addr[0])
output += utils.get_bytes_from_short(addr[1], True)
output += bytearray(recv_data[len(output):])
output[7] = 0x0b # NN_ADDRESS_REPLY
nn.write_queue.put((output, addr, socket))
logger.log(logging.DEBUG, "Sent address check response to %s:%d...", *addr)
logger.log(logging.DEBUG, "%s", utils.pretty_print_hex(output))
def handle_natneg_init(nn, recv_data, addr, socket):
"""Command: 0x00 - NN_INIT.
Send by the client to initialize the connection.
Example:
fd fc 1e 66 6a b2 03 00 3d f1 00 71 00 00 01 0a
00 01 e2 00 00 6d 61 72 69 6f 6b 61 72 74 77 69
69 00
Description:
fd fc 1e 66 6a b2 - NATNEG magic
03 - NATNEG version
00 - NATNEG record type
3d f1 00 71 - Session id
00 - Port type (between 0x00 and 0x03)
00 - Client index (0x00 - Client,
0x01 - Host)
01 - Use game port
0a 00 01 e2 - Local IP
00 00 - Local port
GAME_NAME 00 - Game name
"""
logger.log(logging.DEBUG, "Received initialization from %s:%d...", *addr)
session_id = utils.get_int(recv_data, 8)
output = bytearray(recv_data[0:14])
# Checked with Tetris DS, Mario Kart DS, and Metroid Prime
# Hunters, and this seems to be the standard response to 0x00
output += bytearray([0xff, 0xff, 0x6d, 0x16, 0xb5, 0x7d, 0xea])
output[7] = 0x01 # Initialization response
nn.write_queue.put((output, addr, socket))
# Try to connect to the server
gameid = utils.get_string(recv_data, 0x15)
client_id = "%02x" % ord(recv_data[13])
localaddr = utils.get_local_addr(recv_data, 15)
nn.session_list \
.setdefault(session_id, {}) \
.setdefault(client_id,
{
'connected': False,
'addr': '',
'localaddr': None,
'serveraddr': None,
'gameid': None
})
# In fact, it's a pointer
client_id_session = nn.session_list[session_id][client_id]
client_id_session['gameid'] = gameid
client_id_session['addr'] = addr
client_id_session['localaddr'] = localaddr
for client in nn.session_list[session_id]:
# Another pointer
client_session = nn.session_list[session_id][client]
if client_session['connected'] or client == client_id:
continue
# --- Send to requesting client
# Get server info
serveraddr = nn.get_server_addr(gameid, session_id, client)
client_session['serveraddr'] = serveraddr
logger.log(logging.DEBUG,
"Found server from local ip/port: %s from %d", serveraddr,
session_id)
# Get public port
if client_session['serveraddr'] is not None:
publicport = int(client_session['serveraddr']['publicport'])
else:
publicport = \
client_session['localaddr'][1] or \
client_session['addr'][1]
output = bytearray(recv_data[0:12])
output += utils.get_bytes_from_ip_str(client_session['addr'][0])
output += utils.get_bytes_from_short(publicport, True)
# Unknown, always seems to be \x42\x00
output += bytearray([0x42, 0x00])
output[7] = 0x05 # NN_CONNECT
nn.write_queue.put((output, client_id_session['addr'], socket))
logger.log(logging.DEBUG, "Sent connection request to %s:%d...",
*client_id_session['addr'])
logger.log(logging.DEBUG, "%s", utils.pretty_print_hex(output))
# --- Send to other client
# Get server info
serveraddr = nn.get_server_addr(gameid, session_id, client_id)
client_id_session['serveraddr'] = serveraddr
logger.log(logging.DEBUG,
"Found server 2 from local ip/port: %s from %d", serveraddr,
session_id)
# Get public port
if client_id_session['serveraddr'] is not None:
publicport = int(client_id_session['serveraddr']['publicport'])
else:
publicport = \
client_id_session['localaddr'][1] or \
client_id_session['addr'][1]
output = bytearray(recv_data[0:12])
output += utils.get_bytes_from_ip_str(client_id_session['addr'][0])
output += utils.get_bytes_from_short(publicport, True)
# Unknown, always seems to be \x42\x00
output += bytearray([0x42, 0x00])
output[7] = 0x05 # NN_CONNECT
nn.write_queue.put((output, client_session['addr'], socket))
logger.log(logging.DEBUG, "Sent connection request to %s:%d...",
*client_session['addr'])
logger.log(logging.DEBUG, "%s", utils.pretty_print_hex(output))
def handle_natneg_init(nn, recv_data, addr, socket):
"""Command: 0x00 - NN_INIT.
Send by the client to initialize the connection.
Example:
fd fc 1e 66 6a b2 03 00 3d f1 00 71 00 00 01 0a
00 01 e2 00 00 6d 61 72 69 6f 6b 61 72 74 77 69
69 00
Description:
fd fc 1e 66 6a b2 - NATNEG magic
03 - NATNEG version
00 - NATNEG record type
3d f1 00 71 - Session id
00 - Port type (between 0x00 and 0x03)
00 - Client index (0x00 - Client,
0x01 - Host)
01 - Use game port
0a 00 01 e2 - Local IP
00 00 - Local port
GAME_NAME 00 - Game name
"""
logger.log(logging.DEBUG, "Received initialization from %s:%d...", *addr)
session_id = utils.get_int(recv_data, 8)
output = bytearray(recv_data[0:14])
# Checked with Tetris DS, Mario Kart DS, and Metroid Prime
# Hunters, and this seems to be the standard response to 0x00
output += bytearray([0xff, 0xff, 0x6d, 0x16, 0xb5, 0x7d, 0xea])
output[7] = 0x01 # Initialization response
nn.write_queue.put((output, addr, socket))
# Try to connect to the server
gameid = utils.get_string(recv_data, 0x15)
client_id = "%02x" % ord(recv_data[13])
localaddr = utils.get_local_addr(recv_data, 15)
nn.session_list \
.setdefault(session_id, {}) \
.setdefault(client_id,
{
'connected': False,
'addr': '',
'localaddr': None,
'serveraddr': None,
'gameid': None
})
# In fact, it's a pointer
client_id_session = nn.session_list[session_id][client_id]
client_id_session['gameid'] = gameid
client_id_session['addr'] = addr
client_id_session['localaddr'] = localaddr
for client in nn.session_list[session_id]:
# Another pointer
client_session = nn.session_list[session_id][client]
if client_session['connected'] or client == client_id:
continue
# --- Send to requesting client
# Get server info
serveraddr = nn.get_server_addr(gameid, session_id, client)
client_session['serveraddr'] = serveraddr
logger.log(logging.DEBUG,
"Found server from local ip/port: %s from %d",
serveraddr, session_id)
# Get public port
if client_session['serveraddr'] is not None:
publicport = int(client_session['serveraddr']['publicport'])
else:
publicport = \
client_session['localaddr'][1] or \
client_session['addr'][1]
output = bytearray(recv_data[0:12])
output += utils.get_bytes_from_ip_str(client_session['addr'][0])
output += utils.get_bytes_from_short(publicport, True)
# Unknown, always seems to be \x42\x00
output += bytearray([0x42, 0x00])
output[7] = 0x05 # NN_CONNECT
nn.write_queue.put((output, client_id_session['addr'], socket))
logger.log(logging.DEBUG,
"Sent connection request to %s:%d...",
*client_id_session['addr'])
logger.log(logging.DEBUG, "%s", utils.pretty_print_hex(output))
# --- Send to other client
# Get server info
serveraddr = nn.get_server_addr(gameid, session_id, client_id)
client_id_session['serveraddr'] = serveraddr
logger.log(logging.DEBUG,
"Found server 2 from local ip/port: %s from %d",
serveraddr, session_id)
# Get public port
if client_id_session['serveraddr'] is not None:
publicport = int(client_id_session['serveraddr']['publicport'])
else:
publicport = \
client_id_session['localaddr'][1] or \
client_id_session['addr'][1]
output = bytearray(recv_data[0:12])
output += utils.get_bytes_from_ip_str(client_id_session['addr'][0])
output += utils.get_bytes_from_short(publicport, True)
# Unknown, always seems to be \x42\x00
output += bytearray([0x42, 0x00])
output[7] = 0x05 # NN_CONNECT
nn.write_queue.put((output, client_session['addr'], socket))
logger.log(logging.DEBUG,
"Sent connection request to %s:%d...",
*client_session['addr'])
logger.log(logging.DEBUG, "%s", utils.pretty_print_hex(output))
