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Fernando Erd
CanguruChatServer
Commits
3b5199af
Commit
3b5199af
authored
8 years ago
by
Fernando Erd
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#!/usr/bin/env python
#################### Protocol #################################################################
# Marca - Tipo - Destino - Origem - Prioridade - Tamanho - Inic MSG - Mensagem - Fim MSG - CRC#
###############################################################################################
#Marca - 1 Byte Marca inicio de transmissao, inicio de msg fim de msg
#Tipo - 0 Token, 1 - Msg, 2 - ACK, 3 - NACK
#Destino - pode variar de 1 a 4
#Origem - pode variar de 1 a 4
#Prioridade - pode variar de 0 a 7
#Tamanho - tanto faz
#Marca (inicio msg) - 1 Byte
#Mensagem
#CRC - 8 bytes
#Exemplo msg#
#~11313~oie~352D1036
# ~ - inic transmissao
# 1 - tipo da mensagem
# 1 - destino da mensagem
# 3 - origem da mensagem
# 1 - prioridade da mensagem
# 3 - tamanho da string da mensagem
# ~ - delimitador de inicio da mensagem
# oie - mensagem
# ~ - delimitador de fim da mensagem
# 352D1036 - CRC
import
socket
import
threading
import
sys
import
binascii
import
time
import
Queue
global
TOKEN
global
StartTime
global
HighPriority
global
RECEBIDA
global
PRIORITY_TOKEN
PRIORITY_TOKEN
=
7
RECEBIDA
=
1
StartTime
=
0
HighPriority
=
10
TOKEN
=
0
SEND_PORT
=
3131
# Porta que o Servidor envia
RECV_PORT
=
3131
# Porta que o Servidor recebe
class
Protocol
():
def
__init__
(
self
):
self
.
marca
=
"
~
"
#Marca
self
.
type
=
str
(
1
)
#Alterar Depois
self
.
destiny
=
str
(
0
)
self
.
origin
=
str
(
MACHINE_ID
)
self
.
priority
=
str
(
0
)
self
.
msg
=
str
(
0
)
self
.
sizemsg
=
str
(
0
)
self
.
crc
=
str
(
0
)
#set destiny message
def
setDestiny
(
self
):
sys
.
stdout
.
write
(
'
Destino:
'
)
self
.
destiny
=
raw_input
()
while
(
0
>=
int
(
self
.
destiny
))
or
(
int
(
self
.
destiny
)
>=
5
):
print
'
Entrada Invalida, Por favor escolha entre 1 a 4
'
sys
.
stdout
.
write
(
'
Destino:
'
)
self
.
destiny
=
raw_input
()
self
.
destiny
=
str
(
self
.
destiny
)
#set Priority messsage
def
setPriority
(
self
):
sys
.
stdout
.
write
(
'
Prioridade:
'
)
self
.
priority
=
raw_input
()
while
(
0
>=
int
(
self
.
priority
))
or
(
int
(
self
.
priority
)
>=
8
):
print
'
Entrada Invalida, Por favor escolha entre 1 a 7
'
sys
.
stdout
.
write
(
'
Prioridade:
'
)
self
.
priority
=
raw_input
()
self
.
priority
=
7
-
int
(
self
.
priority
)
#set message
def
setMessage
(
self
):
sys
.
stdout
.
write
(
'
Mensagem:
'
)
self
.
msg
=
raw_input
()
#set sizeof message
def
setSizeof
(
self
):
self
.
sizemsg
=
len
(
self
.
msg
)
self
.
sizemsg
=
str
(
self
.
sizemsg
)
#String convert
#set CRC32
def
setCRC32
(
self
):
buff
=
(
binascii
.
crc32
(
self
.
msg
)
&
0xFFFFFFFF
)
self
.
crc
=
"
%08X
"
%
buff
def
getEmpacotar
(
self
):
return
self
.
marca
+
self
.
type
+
self
.
destiny
+
self
.
origin
+
str
(
self
.
priority
)
+
self
.
sizemsg
+
self
.
marca
+
self
.
msg
+
self
.
marca
+
self
.
crc
def
setDesempacota
(
self
,
msg
):
self
.
marca
=
msg
[
0
]
self
.
type
=
msg
[
1
]
self
.
destiny
=
str
(
msg
[
2
])
self
.
origin
=
msg
[
3
]
self
.
priority
=
msg
[
4
]
self
.
msg
=
msg
.
split
(
'
~
'
,
3
)[
2
]
self
.
crc
=
msg
.
split
(
'
~
'
,
3
)[
3
]
def
getCRC32
(
self
):
buff
=
(
binascii
.
crc32
(
self
.
msg
)
&
0xFFFFFFFF
)
return
"
%08X
"
%
buff
def
token
():
global
TOKEN
global
StartTime
global
queue
global
RECEBIDA
global
PRIORITY_TOKEN
udp
=
socket
.
socket
(
socket
.
AF_INET
,
socket
.
SOCK_DGRAM
)
tokenMessage
=
Protocol
()
msgProtocol
=
Protocol
()
dest
=
(
HOST
,
SEND_PORT
)
while
True
:
EndTime
=
time
.
time
()
if
(
EndTime
-
StartTime
>=
10
and
TOKEN
==
1
):
#print 'MANDEI O TOKEN'
TOKEN
=
0
tokenMessage
.
type
=
str
(
0
)
tokenMessage
.
priority
=
str
(
PRIORITY_TOKEN
)
msg
=
tokenMessage
.
getEmpacotar
()
udp
.
sendto
(
msg
,
dest
)
#time.sleep(2)
if
(
not
queue
.
empty
()):
m
=
queue
.
queue
[
0
]
if
(
int
(
PRIORITY_TOKEN
)
>=
int
(
m
[
0
])):
queue
.
get
()
msgProtocol
.
setDesempacota
(
m
[
1
])
msgProtocol
.
priority
=
str
(
7
)
msg
=
msgProtocol
.
getEmpacotar
()
udp
.
sendto
(
msg
,
dest
)
time
.
sleep
(
1
)
while
(
RECEBIDA
==
0
):
print
'
ENVIANDO NOVAMENTE A MSG
'
udp
.
sendto
(
msg
[
1
],
dest
)
time
.
sleep
(
1
)
udp
.
close
()
def
client
():
try
:
global
TOKEN
global
HighPriority
protocolMessage
=
Protocol
()
global
queue
queue
=
Queue
.
PriorityQueue
()
while
True
:
protocolMessage
.
setDestiny
()
protocolMessage
.
setPriority
()
protocolMessage
.
setMessage
()
protocolMessage
.
type
=
str
(
1
)
protocolMessage
.
setSizeof
()
protocolMessage
.
setCRC32
()
msg
=
protocolMessage
.
getEmpacotar
()
queue
.
put
((
protocolMessage
.
priority
,
msg
))
threadServer
.
_Thread__stop
()
threadToken
.
_Thread__stop
()
except
:
print
'
OPS, ALGO OCORREU ERRADO
'
threadServer
.
_Thread__stop
()
threadToken
.
_Thread__stop
()
def
server
():
global
TOKEN
global
StartTime
global
RECEBIDA
global
queue
global
PRIORITY_TOKEN
udp
=
socket
.
socket
(
socket
.
AF_INET
,
socket
.
SOCK_DGRAM
)
orig
=
(
''
,
RECV_PORT
)
dest
=
(
HOST
,
SEND_PORT
)
udp
.
bind
(
orig
)
protocolDescompactMessage
=
Protocol
()
aux1
=
Protocol
()
aux2
=
Protocol
()
while
True
:
msg
,
cliente
=
udp
.
recvfrom
(
1024
)
protocolDescompactMessage
.
setDesempacota
(
msg
)
if
(
protocolDescompactMessage
.
type
==
'
1
'
and
int
(
MACHINE_ID
)
==
int
(
protocolDescompactMessage
.
origin
)):
print
'
SETANDO A PRIORIDADE
'
PRIORITY_TOKEN
=
protocolDescompactMessage
.
priority
print
PRIORITY_TOKEN
print
'
EU RECEBI A MSG QUE ENVIEI
'
elif
(
protocolDescompactMessage
.
type
==
'
0
'
and
TOKEN
==
0
):
print
'
RECEBI O TOKEN
'
TOKEN
=
1
StartTime
=
time
.
time
()
#A msg e pra mim
elif
(
msg
[
1
]
==
'
1
'
and
int
(
MACHINE_ID
)
==
int
(
protocolDescompactMessage
.
destiny
)):
udp
.
sendto
(
msg
,
dest
)
if
(
protocolDescompactMessage
.
crc
==
protocolDescompactMessage
.
getCRC32
()):
print
'
\n
'
+
protocolDescompactMessage
.
origin
+
'
Escreveu:
'
+
protocolDescompactMessage
.
msg
else
:
print
'
ERRO DE MENSAGEM
'
udp
.
sendto
(
msg
,
dest
)
#A msg n e pra mim
elif
(
msg
[
1
]
==
'
1
'
):
if
(
not
queue
.
empty
()):
top
=
queue
.
queue
[
0
]
HighPriorat
=
int
(
top
[
0
])
if
(
HighPriorat
<
int
(
msg
[
4
])):
aux1
.
setDesempacota
(
msg
)
aux1
.
priority
=
str
(
HighPriorat
)
msg
=
aux1
.
getEmpacotar
()
print
msg
udp
.
sendto
(
msg
,
dest
)
udp
.
close
()
#------------------MAIN-----------------#
if
len
(
sys
.
argv
)
>
1
:
TOKEN
=
1
print
'
COMECEI COM O TOKEN
'
StartTime
=
time
.
time
()
print
'
ID Dessa maquina, escolha entre 1 e 4
'
MACHINE_ID
=
raw_input
()
print
"
Ip da proxima maquina
"
HOST
=
raw_input
()
if
TOKEN
==
1
:
StartTime
=
time
.
time
()
threadServer
=
threading
.
Thread
(
target
=
server
)
threadClient
=
threading
.
Thread
(
target
=
client
)
threadToken
=
threading
.
Thread
(
target
=
token
)
threadServer
.
start
()
threadClient
.
start
()
threadToken
.
start
()
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