CODEWITHSUNDEEP
pythonwindowssocketsnetwork-programmingtcp
yotam azriel
yotam azriel

Reputation: 1

trying to bind to specific external ip:: [Errno 10049] The requested address is not valid in its context could not open socket-(python 2.7)

I have a Moxa device that create Tcp-ip message from serial data and send them to me by LAN. i need to listen to hes specific external-ip(172.16.0.77) with python server. ill try to do this:

    BUFFER_SIZE = 10000  # Normally 1024, but we want fast response
    HOST = self.TCP_IP  #(172.16.0.77)
    PORT = self.TCP_PORT              # Arbitrary non-privileged port
    s = None
    for res in socket.getaddrinfo(HOST, PORT, socket.AF_UNSPEC,
                                  socket.SOCK_STREAM, 0, socket.AI_PASSIVE):
        af, socktype, proto, canonname, sa = res
        try:
            s = socket.socket(af, socktype, proto)
        except socket.error as msg:
            print msg
            s = None
            continue
        try:
            s.bind(sa)
            s.listen(1)
        except socket.error as msg:
            print msg
            s.close()
            s = None
            continue
        break
    if s is None:
        print 'could not open socket'
    while s:
        print s.getsockname()
        conn, addr = s.accept()
        print 'Connection address:', addr
        data = conn.recv(BUFFER_SIZE)
        if data:
            self.emit(QtCore.SIGNAL("SamplesRecive"),data)
        conn.close()

and i get : [Errno 10049] The requested address is not valid in its context could not open socket I need to divide the serves to many Moxa devices so i cant use socket.INADDR_ANY

Any ideas?

Upvotes: 0

Views: 994

Answers (1)

dsgdfg
dsgdfg

Reputation: 1510

socket.INADDR_ANY equal to socket.bind('0.0.0.0')

if bind to "0.0.0.0" can listen all interfaces(which avaible)

Example of Moxa TCP :

import socket,time
import thread

#Example client
class _client :
    def __init__(self):
        self.status = False
    def run(self,clientsock,addr):
        while 1 :
            try:
                data = clientsock.recv(BUFF)
                if data :
                    #do something with data
                    time.sleep(.1)
                    if self.status == False:
                        clientsock.close()
                        break
                    clientsock.send(next_query)


             except Exception,e :
                print e
                break
client = _client()
ADDR = ("0.0.0.0", 45500) #so you need port how to decode raw socket data ?
serversock = socket(AF_INET, SOCK_STREAM)
serversock.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
serversock.setsockopt(IPPROTO_TCP, TCP_NODELAY, 1)#gain 50ms tcp delay
serversock.bind(ADDR)
serversock.listen(10)

While True :
    clientsock, addr = serversock.accept()
    if addr[0] == device_1_IP:
        client.status = True
        #start device1 thread(moxa is TCP client mode)
        thread.start_new_thread(client.run, (clientsock, addr))
        #if client.status = False you will be close connection.

But my offer is "use moxa with TCP server mode"

i am used 4x5450i 3x5250 over 120 device without any error.

Upvotes: 1

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