def login(self, tracker_ip, tracker_port = 80):
try:
login_sock = connect_socket(tracker_ip, tracker_port)
login_sock.send("LOGI")
login_sock.send(format_ip_address(get_local_ip(login_sock.getsockname()[0])))
login_sock.send(format_port_number(self.local_port))
response = read_from_socket(login_sock, 4) #read ALGI
if response == "ALGI":
my_session_id = read_from_socket(login_sock, 16)
login_sock.close()
UsersManager.set_my_session_id(my_session_id)
klog("Done. My session id is: %s" % my_session_id)
UsersManager.set_tracker(Peer(tracker_ip,tracker_port))
self.ui_handler.login_done(my_session_id)
return True
else:
raise Exception("Response command error: %s" %response)
except Exception, ex:
klog(str(ex))
self.ui_handler.login_done(None)
def update_remote_file_data(self, file_id):
my_tracker = UsersManager.get_tracker()
try:
sock = connect_socket(my_tracker.ip, my_tracker.port)
local_ip = get_local_ip(sock.getsockname()[0])
sock.send("FCHU" + UsersManager.get_my_session_id())
sock.send(file_id)
command = read_from_socket(sock, 4)
if command == "AFCH":
hitpeer = read_from_socket(sock, 3)
for i in range(0, int(hitpeer)):
peer_ip = read_from_socket(sock, 15)
peer_port = read_from_socket(sock, 5)
f = FilesManager.find_file_by_id(file_id)
if not f:
raise Exception("File %s not found in request emitter" % file_id)
mask_length = int(math.ceil(f.parts_count / 8))
if f.parts_count % 8 != 0:
mask_length += 1
klog("MASK_LENGTH = %s" % mask_length)
partlist = read_from_socket(sock, mask_length)
partlist_array = []
for b in partlist:
byte = bin(int(binascii.b2a_hex(b),16))
byte = byte[2:]
byte = format_byte(byte)
for i in range(7,-1, -1):
partlist_array.append(byte[i])
for j in range(len(partlist_array)):
#klog("%s PARTE %s: %s" %(file_id,j,partlist_array[j]))
FilesManager.update_remote_file_part(file_id, Peer(peer_ip, peer_port), j, bool(int(partlist_array[j])))
except Exception, ex:
klog("Exception in updating file data to tracker: %s" % str(ex))
def search_for_files(self, query, ttl = TTL_FOR_FILES_SEARCH ):
p_id = generate_packet_id(16)
PacketsManager.add_new_generated_packet(p_id)
if UsersManager.is_super_node():
# We need to search both locally and in the network
PacketsManager.register_packet_id_as_local_search(p_id)
# Perform a local search here.
for file in FilesManager.find_files_by_query(query):
owner = UsersManager.find_user_by_session_id(file.session_id)
if owner:
self.ui_handler.add_new_result_file(file.filename, owner.ip, owner.port, file.hash)
# ...and send a QUER in the network, its results will be handled properly and should not interfere with
# the ones of the local search
for superpeer in PeersManager.find_known_peers():
sock = connect_socket(superpeer.ip, superpeer.port)
local_ip = get_local_ip(sock.getsockname()[0])
sock.send("QUER" + p_id + format_ip_address(local_ip) + format_port_number(self.local_port) + format_ttl(ttl) + format_query(query))
sock.close()
klog("Started query flooding for files: %s ttl: %s" %(query,ttl) )
else:
my_superpeer = UsersManager.get_superpeer()
if my_superpeer:
sock = connect_socket(my_superpeer.ip, 80)#my_superpeer.port)
sock.send("FIND" + UsersManager.get_my_session_id() + format_query(query))
klog("Started FIND for files: %s ttl: %s" %(query,ttl) )
# We need also some handling for those stupid peers that do not close the socket...
#time.sleep(5)
if read_from_socket(sock, 4) == 'AFIN':
ServiceThread.afin_received(sock, self.ui_handler)
def _choose_random_superpeer():
superpeers = PeersManager.find_known_peers(True)
if len(superpeers) > 0:
my_superpeer = superpeers[random.randrange(0, len(superpeers),1)]
UsersManager.set_superpeer(my_superpeer)
klog("Choose this superpeer: %s:%s" %(my_superpeer.ip, str(my_superpeer.port)))
klog("Login...")
login_sock = connect_socket(my_superpeer.ip, 80)# int(my_superpeer.port))
login_sock.send("LOGI")
login_sock.send(format_ip_address(get_local_ip(login_sock.getsockname()[0])))
login_sock.send(format_port_number(self.local_port))
try:
read_from_socket(login_sock, 4) #read ALGI
my_session_id = read_from_socket(login_sock, 16)
login_sock.close()
UsersManager.set_my_session_id(my_session_id)
klog("Done. My session id is: %s" %my_session_id)
self.ui_handler.superpeer_choosen(my_superpeer.ip, my_superpeer.port)
self.ui_handler.login_done(my_session_id)
except Exception, ex:
klog(ex)
def unregister_file(self, file):
my_superpeer = UsersManager.get_superpeer()
sock = connect_socket(my_superpeer.ip, 80)#my_superpeer.port)
local_ip = get_local_ip(sock.getsockname()[0])
sock.send("DEFF" + UsersManager.get_my_session_id())
sock.send(decode_md5(file.hash))
sock.close()
def logout_user(self, session_id):
user = UsersManager.find_user_by_session_id(session_id)
if user:
numdeleted = FilesManager.delete_files_for_user(user)
UsersManager.delete_user(user)
return numdeleted
else:
return -1
def logout(self):
my_superpeer = UsersManager.get_superpeer()
sock = connect_socket(my_superpeer.ip, 80)#my_superpeer.port)
sock.send("LOGO" + UsersManager.get_my_session_id())
response = read_from_socket(sock, 4)
num_file_deleted = -1
if response == "ALGO":
num_file_deleted = int(read_from_socket(sock, 3))
klog("LOGOUT Done. Deleted %d files" % num_file_deleted)
else:
klog("LOGOUT non eseguito")
sock.close()
return num_file_deleted
def _ask_for_peer_role():
msg_box = QMessageBox()
msg_box.setText("Are you a super peer?")
msg_box.addButton(QMessageBox.Yes)
msg_box.addButton(QMessageBox.No)
msg_box.show()
msg_box.raise_()
selection = msg_box.exec_()
is_superpeer = (selection == QMessageBox.Yes)
UsersManager.set_is_super_node(is_superpeer)
return is_superpeer
def logout(self):
my_tracker = UsersManager.get_tracker()
sock = connect_socket(my_tracker.ip, 80)
sock.send("LOGO" + UsersManager.get_my_session_id())
response = read_from_socket(sock, 4)
num_file_deleted = -1
if response == "ALOG":
num_file_deleted = int(read_from_socket(sock, 10))
klog("LOGOUT Done. Deleted %d files" % num_file_deleted)
elif response == "NLOG":
num_files = int(read_from_socket(sock, 10))
klog("LOGOUT refused from directory, you are the source for %d files" % num_files)
else:
klog("LOGOUT not working correctly in directory")
sock.close()
return num_file_deleted
def load_my_files(cls):
for dirname, dirnames, filenames in os.walk(SHARED_PATH):
for filename in filenames:
path = dirname + "/" + filename
md5 = hashing.encode_md5(hashing.calculate_md5_for_file_path(path))
file = None
if UsersManager.is_super_node():
file = File(path, filename, md5, "0"*16)
else:
file = File(path, filename, md5, UsersManager.get_my_session_id)
cls.shared_files().append(file)
def add_file_to_tracker(self, file):
my_tracker = UsersManager.get_tracker()
sock = connect_socket(my_tracker.ip, my_tracker.port)
local_ip = get_local_ip(sock.getsockname()[0])
sock.send("ADDR" + UsersManager.get_my_session_id())
sock.send(file.id)
sock.send(format_filesize(file.file_size))
sock.send(format_partsize(file.part_size))
sock.send(format_filename(file.filename))
try:
response = read_from_socket(sock, 4)
if response == "AADR":
part_num = read_from_socket(sock, 8)
if int(part_num) == int(file.parts_count):
klog("File %s successfully added to directory service" % file.filename)
else:
klog("Wrong partnumber received from directory")
else:
klog("wrong ack received from directory service")
except Exception, ex:
klog("Exception in adding file to tracker: %s" % str(ex))
def register_part_to_tracker(self, file, part_num):
my_tracker = UsersManager.get_tracker()
sock = connect_socket(my_tracker.ip, my_tracker.port)
local_ip = get_local_ip(sock.getsockname()[0])
sock.send("RPAD" + UsersManager.get_my_session_id())
sock.send(file.id)
sock.send(format_partnum(part_num))
try:
response = read_from_socket(sock,4)
if response == "APAD":
part_num = int(read_from_socket(sock, 8))
klog("Part num from tracker: %s" %str(part_num))
if part_num == FilesManager.get_completed_file_parts_nums_count(file.id):
klog("Part succesfully registered")
else:
klog("Wrong partnumber from directory received %s but i have %s" %(str(part_num), str(FilesManager.get_completed_file_parts_nums_count(file.id))))
else:
klog("Wrong ack received from directory service when trying to register a part")
except Exception, ex:
klog("Exception in registering a downloaded part on the tracker: %s" %str(ex))
def search_for_files(self, query):
my_tracker = UsersManager.get_tracker()
try:
sock = connect_socket(my_tracker.ip, my_tracker.port)
sock.send("LOOK" + UsersManager.get_my_session_id() + format_query(query))
klog("Started LOOK for file: %s" %query)
if read_from_socket(sock, 4) == 'ALOO':
files_count = int(read_from_socket(sock, 3))
for i in range(0, files_count):
file_id = read_from_socket(sock, 16)
file_name = read_from_socket(sock, 100).strip(' ')
file_size = read_from_socket(sock, 10)
part_size = read_from_socket(sock, 6)
FilesManager.add_new_remote_file(file_name, file_id, file_size, part_size)
self.ui_handler.add_new_result_file(file_name, file_id, file_size, part_size)
else:
raise Exception("Response command error: %s. Wanted LOOK" % response)
except Exception, ex:
klog(str(ex))
def run(self):
try:
self._socket.setblocking(1) # <-------- ??
command = str(self._socket.recv(4))
#
# PEERS
#
# Received package asking for a file
if command == "RETP":
klog("RETP received")
CHUNK_DIM = 128
file_id = self._socket.recv(16)
part_num = int(self._socket.recv(8))
self._socket.send("AREP") #sending the ack command
remote_ip = self._socket.getpeername()[0]
my_session_id = UsersManager.get_my_session_id()
# Get the file matching the file_id
klog("finding file with id: %s, session_id %s, part %s" %(file_id, my_session_id, part_num))
file = FilesManager.find_file_by_id(file_id)
if file:
klog("i have found the file: %s stored in %s" % (file.filename, file.filepath))
# Chunks
size = file.get_part_size(part_num)#file_size(file.filepath)
bytes_sent = 0
chunks_num = int(size // CHUNK_DIM)
leftover = size % CHUNK_DIM
if leftover != 0.0:
chunks_num += 1
self._socket.send(format_chunks_number(chunks_num)) #sending the chunks number
part = file.get_part(part_num)
part_size = file.get_part_size(part_num)
index = 0
chunk = part[0:CHUNK_DIM]
while True:
self._socket.send(format_chunk_length(len(chunk))) #sending the chunk length
bytes_sent += self._socket.send(chunk) #sending the chunk
percent = bytes_sent*100/size
self.ui_handler.upload_file_changed(file.filename, file.id, part_num, remote_ip, percent)
index += 1
if ((index * CHUNK_DIM) <= part_size) and ((index + 1)* CHUNK_DIM <= part_size):
chunk = part[index * CHUNK_DIM : (index + 1)* CHUNK_DIM]
elif ((index * CHUNK_DIM) <= part_size) and ((index + 1)* CHUNK_DIM > part_size):
chunk = part[index * CHUNK_DIM : ]
else:
break
'''
#open the file
file2send = file.get_part(part_num)#open(file.filepath, 'rb')
chunk = file2send.read(CHUNK_DIM)
while chunk != '':
self._socket.send(format_chunk_length(len(chunk))) #sending the chunk length
bytes_sent += self._socket.send(chunk) #sending the chunk
percent = bytes_sent*100/size
self.ui_handler.upload_file_changed(file.filename, file.id, part_num, remote_ip, percent)
chunk = file2send.read(CHUNK_DIM)
file2send.close()
'''
klog("upload completed: %s" %file.filename)
self.ui_handler.upload_file_changed(file.filename, file.id, part_num, remote_ip, 100)
else:
klog("I do not have this file!")
else:
klog("ERROR: received a %s command that service_thread does not have to handle:" %command)
# Close the socket
self._socket.close()
except Exception, ex:
print ex
def add_file(self, session_id, hash, file_name):
user = UsersManager.find_user_by_session_id(session_id)
if user:
FilesManager.create_file(file_name, hash, user)
def run(self):
try:
self._socket.setblocking(1) # <-------- ??
command = str(self._socket.recv(4))
#
# FILES
#
# Received package looking for a file
if command == "QUER":
if UsersManager.is_super_node():
pckt_id = str(self._socket.recv(16))
sender_ip = str(self._socket.recv(15))
sender_port = str(self._socket.recv(5))
ttl = int(self._socket.recv(2))
query = str(self._socket.recv(20))
klog("%s pid: %s %s:%s ttl: %s query: %s" % (command, pckt_id, sender_ip, sender_port, ttl, query))
if not PacketsManager.is_packet_id_known(pckt_id):
PacketsManager.add_new_packet(pckt_id, sender_ip)
if int(ttl) > 0:
# look for the requested file
for f in FilesManager.find_files_by_query(query):
command = "AQUE"
sock = connect_socket(sender_ip, sender_port)
sock.send(
command + pckt_id + format_ip_address(self.ip) + format_port_number(self.port)
)
sock.send(decode_md5(f.hash))
sock.send(format_filename(f.filename))
klog(
"command sent %s pkid:%s %s:%s md5: %s filename: %s"
% (command, pckt_id, self.ip, self.port, f.hash, f.filename)
)
sock.close()
# decrease ttl propagate the message to the peers
ttl = format_ttl(ttl - 1)
if int(ttl) > 0:
for superpeer in PeersManager.find_known_peers(superpeers=True):
# query flooding to the known superpeers peers except for the sender
if not PeersManager.are_same_peer(superpeer, Peer(sender_ip, sender_port)):
sock = connect_socket(superpeer.ip, superpeer.port)
sock.send(command + pckt_id + sender_ip + sender_port + str(ttl) + query)
klog(
"command sent to %s:%s: %s pkid:%s %s:%s ttl: %s query: %s"
% (
superpeer.ip,
superpeer.port,
command,
pckt_id,
sender_ip,
sender_port,
ttl,
query,
)
)
sock.close()
# Received package in reply to a file research
elif command == "AQUE":
klog("AQUE received")
search_id = str(self._socket.recv(16))
sender_ip = str(self._socket.recv(15))
sender_port = str(self._socket.recv(5))
hash = encode_md5(self._socket.recv(16))
filename = str(self._socket.recv(100)).strip(" ")
if PacketsManager.is_local_search(search_id):
if PacketsManager.is_generated_packet_still_valid(search_id):
klog("Found %s from %s:%s" % (filename, sender_ip, sender_port))
self.ui_handler.add_new_result_file(filename, sender_ip, sender_port, hash)
else:
ServiceThread.add_query_result(search_id, sender_ip, sender_port, hash, filename)
elif command == "FIND":
if UsersManager.is_super_node():
session_id = str(self._socket.recv(16))
query = str(self._socket.recv(20))
p_id = generate_packet_id(16)
ttl = 3
# Launch a request to the other super peers with the query
for superpeer in PeersManager.find_known_peers(True):
sock = connect_socket(superpeer.ip, superpeer.port)
local_ip = get_local_ip(sock.getsockname()[0])
sock.send(
"QUER"
+ p_id
+ format_ip_address(local_ip)
+ format_port_number(self.port)
+ format_ttl(ttl)
+ format_query(query)
)
sock.close()
ServiceThread.initialize_for_pckt(p_id) # enable the receive of packets for this query
time.sleep(20)
# search_id is the packet id of QUER request, it identifies univocally the query
superpeers_result = ServiceThread.get_query_results(p_id)
my_directory_result = FilesManager.find_files_by_query(query)
ServiceThread.clear_pending_query(p_id)
result = {}
# costruisco l array di risultati
for r in superpeers_result:
if result.has_key(r["hash"]):
result[r["hash"]].peers.append([{"ip": r["ip"], "port": r["port"]}])
else:
result[r["hash"]] = {
"filemd5": r["hash"],
"filename": r["filename"],
"peers": [{"ip": r["ip"], "port": r["port"]}],
}
for f in my_directory_result:
if f.is_my_file():
if result.has_key(f.hash):
result[f.hash]["peers"].append({"ip": self.ip, "port": self.port})
else:
result[f.hash] = {
"filemd5": f.hash,
"filename": f.filename,
"peers": [{"ip": self.ip, "port": self.port}],
}
else:
u = UsersManager.find_user_by_session_id(f.session_id)
if result.has_key(f.hash):
result[f.hash]["peers"].append({"ip": u.ip, "port": u.port})
else:
result[f.hash] = {
"filemd5": f.hash,
"filename": f.filename,
"peers": [{"ip": u.ip, "port": u.port}],
}
# must send AFIN
# self._socket.close()
peer = UsersManager.find_user_by_session_id(session_id)
# sock = connect_socket(peer.ip, peer.port)
sock = self._socket
sock.send("AFIN" + format_deletenum(len(result)))
for key, r in result.items():
sock.send(decode_md5(r["filemd5"]))
sock.send(format_filename(r["filename"]))
sock.send(format_deletenum(len(r["peers"])))
for peer in r["peers"]:
sock.send(format_ip_address(peer["ip"]))
sock.send(format_port_number(peer["port"]))
# threading.Timer(20, self.search_finished, args=(p_id,)).start() #calls the fun function with p_id as argument
klog("Sent AFIN")
elif command == "AFIN":
klog("AFIN received")
ServiceThread.afin_received(self._socket, self.ui_handler)
#
# PEERS
#
elif command == "LOGI":
if UsersManager.is_super_node():
peer_ip = str(read_from_socket(self._socket, 15))
peer_port = str(read_from_socket(self._socket, 5))
if UsersManager.find_user_by_ip(peer_ip) is not None:
self._socket.send("ALGI" + "0" * 16)
klog("Sent ALGI" + "0" * 16 + "to: %s" % (peer_ip))
else:
session_id = self.login_user(peer_ip, peer_port)
klog(
"Received a LOGI, from: %s, port: %s. Session id created: %s"
% (peer_ip, peer_port, session_id)
)
self._socket.send("ALGI" + session_id)
klog("Sent ALGI to: %s, port: %s" % (peer_ip, peer_port))
self.ui_handler.add_new_peer(peer_ip, peer_port)
elif command == "ALGI":
# Normally this is done in the RequestEmitter, but we have the same code here to
# prevent crashes in case of closed and re-opened socket
session_id = str(read_from_socket(self._socket, 16))
klog("ALGI received form super peer: %s", session_id)
UsersManager.set_my_session_id(session_id)
self.ui_handler.login_done(session_id)
elif command == "LOGO":
peer_session_id = str(read_from_socket(self._socket, 16))
peer = UsersManager.find_user_by_session_id(peer_session_id)
peer_ip = peer.ip
peer_port = peer.port
klog("Received a LOGO, from session_id: %s. Peer: %s:%s" % (peer_session_id, peer_ip, peer_port))
delete_num = self.logout_user(peer_session_id)
self._socket.send("ALGO" + format_deletenum(delete_num))
klog("Sent ALGO to session_id: %s deletenum: %d" % (peer_session_id, delete_num))
self.ui_handler.remove_peer(peer_ip, peer_port)
elif command == "ALGO":
delete_num = read_from_socket(self._socket, 3)
klog("ALGO received. delete num: %s" % delete_num)
UsersManager.set_my_session_id("")
klog("TODO: destroy the listening client???")
# Received package looking for super-peer
elif command == "SUPE":
klog("SUPE received")
pckt_id = str(read_from_socket(self._socket, 16))
sender_ip = str(read_from_socket(self._socket, 15))
sender_port = str(read_from_socket(self._socket, 5))
ttl = int(read_from_socket(self._socket, 2))
if not PacketsManager.is_packet_id_known(pckt_id):
PacketsManager.add_new_packet(pckt_id, sender_ip)
if int(ttl) > 0:
if UsersManager.is_super_node():
# Respond with an ASUP
sock = connect_socket(sender_ip, sender_port)
sock.send("ASUP" + pckt_id + self.ip + self.port + str(ttl))
klog(
"command sent to %s:%s: ASUP pkid:%s %s:%s ttl: %s"
% (sender_ip, sender_port, pckt_id, self.ip, self.port, ttl)
)
sock.close()
# decrease ttl and propagate the message to the peers/superpeers
ttl = format_ttl(ttl - 1)
if int(ttl) > 0:
# propagate the SUPE
for peer in PeersManager.find_known_peers():
if not PeersManager.are_same_peer(peer, Peer(sender_ip, sender_port)):
sock = connect_socket(peer.ip, peer.port)
sock.send("SUPE" + pckt_id + sender_ip + sender_port + str(ttl))
klog(
"command sent to %s:%s: SUPE pkid:%s %s:%s ttl: %s"
% (peer.ip, peer.port, pckt_id, sender_ip, sender_port, ttl)
)
sock.close()
# Received package in reply to a super-peer search
elif command == "ASUP":
pckt_id = str(self._socket.recv(16))
peer_ip = str(self._socket.recv(15))
peer_port = str(self._socket.recv(5))
klog("ASUP received from %s:%s" % (peer_ip, peer_port))
if PacketsManager.is_generated_packet_still_valid(pckt_id):
# Check if the superpeer war already added as a normal peer
if PeersManager.is_known_peer(Peer(peer_ip, peer_port)):
PeersManager.become_superpeer(peer_ip, peer_port)
self.ui_handler.add_new_superpeer(peer_ip, peer_port)
else:
if peer_ip != self.ip:
PeersManager.add_new_peer(Peer(peer_ip, peer_port, True))
self.ui_handler.add_new_superpeer(peer_ip, peer_port)
# Received package asking for a file
elif command == "RETR":
klog("RETR received")
CHUNK_DIM = 128
md5 = encode_md5(self._socket.recv(16))
self._socket.send("ARET") # sending the ack command
remote_ip = self._socket.getpeername()[0]
my_session_id = UsersManager.get_my_session_id()
# Get the file matching the md5
klog("finding file with md5: %s, session_id %s" % (md5, my_session_id))
file = FilesManager.find_file_by_hash(md5)
if file:
klog("i have found the file: %s stored in %s" % (file.filename, file.filepath))
# Chunks
size = file_size(file.filepath)
bytes_sent = 0
chunks_num = int(size // CHUNK_DIM)
leftover = size % CHUNK_DIM
if leftover != 0.0:
chunks_num += 1
self._socket.send(format_chunks_number(chunks_num)) # sending the chunks number
# open the file
file2send = open(file.filepath, "rb")
chunk = file2send.read(CHUNK_DIM)
while chunk != "":
self._socket.send(format_chunk_length(len(chunk))) # sending the chunk length
bytes_sent += self._socket.send(chunk) # sending the chunk
percent = bytes_sent * 100 / size
self.ui_handler.upload_file_changed(file.filename, file.hash, remote_ip, percent)
chunk = file2send.read(CHUNK_DIM)
file2send.close()
klog("upload completed: %s" % file.filename)
self.ui_handler.upload_file_changed(file.filename, file.hash, remote_ip, 100)
else:
klog("I do not have this file!")
elif command == "ADFF":
peer_session_id = str(read_from_socket(self._socket, 16))
file_hash = encode_md5(read_from_socket(self._socket, 16))
file_name = str(read_from_socket(self._socket, 100)).strip(" ")
klog("Received a ADFF, from: %s. Hash: %s. Filename: %s." % (peer_session_id, file_hash, file_name))
self.add_file(peer_session_id, file_hash, file_name)
elif command == "DEFF":
peer_session_id = str(read_from_socket(self._socket, 16))
file_hash = encode_md5(read_from_socket(self._socket, 16))
self.remove_file(peer_session_id, file_hash)
klog("Received a DELF, from: %s. Hash: %s." % (peer_session_id, file_hash))
if command == "":
condition = False
# Close the socket
self._socket.close()
except Exception, ex:
condition = False
print ex
def login_user(self, ip, port):
user = UsersManager.create_user(ip, port)
return user.session_id
