Error code 10056

I’ve read throught this introduction to python sockets:
http://docs.python.org/3.3/howto/sockets.html

This is my server

import socket
serversocket=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
serversocket.bind(("localhost",8000))
serversocket.listen(5)
while True:
    (client,addr)=serversocket.accept()
    data=serversocket.recv(1024)
    print(data.decode("utf-8"))

and this is the client

import socket
s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("localhost",8000))

The idea is that the server just prints all the data that was sent from the client. As you can see, I intended to encode the message strings as bytes with utf-8. But I never came that far.

With the server script running, I typed the client lines one by one into an IDLE python shell. After the third line, this error prompted up. Since I’m German, this is a vague translation. The error message will probably sound different if you can reproduce the error

Traceback (most recent call last): File «», line 1, in

s.connect((«localhost»,8000)) OSError: [WinError 10056] A connection attempt targeted an already connected socket.

How can I solve this error ? The server is slightly adapted, but the client is the exact code from the tutorial. And the error seens rather strange, after all I want the socket to be already connected — with the server . At first I thought that somehow there were already sockets connected to my server but restarting it and typing the client code again lead to the same result.

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void setPort(String ^port){
		connectSock();
		P.port=To_string(port);
		args.param="";
		_beginthread(sendHTTP,0,&args);
		args.param="newmap=1";
		_beginthread(sendHTTP,0,&args);

	}

void connectSock(){

		psock.sockVer = MAKEWORD(1, 1);	
		psock.ic=false;
		WSAStartup(psock.sockVer, &psock.wsaData);		
		char url[512];
		sprintf(url, P.httpUrl.c_str());
		memset(&psock.hints, 0, sizeof psock.hints);
		psock.hints.ai_family = AF_UNSPEC;
		psock.hints.ai_socktype = SOCK_STREAM;
		getaddrinfo(url, "80", &psock.hints, &psock.srvrData);
		psock.sock = socket(psock.srvrData->ai_family, psock.srvrData->ai_socktype, psock.srvrData->ai_protocol);
		if (psock.sock == INVALID_SOCKET) {
		closeSock(psock.sock);
		P.Event="Socket fail... ";
		std::stringstream outo;
			outo << WSAGetLastError();
			P.Event+=outo.str();
		return ;
		} 
		if(connect(psock.sock, psock.srvrData->ai_addr, psock.srvrData->ai_addrlen)<0){
			P.Event="Connect Fail";
			return ;
		}
		psock.ic=true;
	}

	void sendHTTP(string tpost){     
	
		if(!psock.ic)return;
		try{		
			if(tpost.length()!=0)tpost+="&";
			if(P.post.length()!=0)tpost+=P.post;
			if(tpost.length()!=0)tpost+="&";
			tpost+="port="+P.port;
			string buffer2="POST "+P.path+" HTTP/1.0rnHost: "+P.httpUrl+"rnUser-Agent: Mozilla/4.0rnContent-Length: ";
			std::stringstream outo;
			outo << tpost.length();
			buffer2+= outo.str();
			buffer2+="rnContent-Type: application/x-www-form-urlencodedrnrn";
			buffer2+=tpost;
			buffer2+="n";
	
			if(send(psock.sock, buffer2.c_str(), buffer2.length(), 0)<buffer2.length()){
				P.Event="Send error ";
				string s=(string)strerror(errno);
				P.Event+=(s);
				std::stringstream outo;
			outo << WSAGetLastError();
			P.Event+=outo.str();
				sendHTTP( tpost);
				return;
			}

		}catch(Exception ^ex){
		}
		return;
	}

	void setPort(String ^port){
		connectSock();
		P.port=To_string(port);
		sendHTTP("");
		sendHTTP("newmap=1");

	}

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this is my log:

2019-02-20 22:08:28,478 — INFO — PAI — Starting Paradox Alarm Interface
2019-02-20 22:08:28,479 — INFO — PAI — Console Log level set to 10
2019-02-20 22:08:29,480 — INFO — PAI — Using IP Connection
2019-02-20 22:08:29,646 — INFO — PAI — Starting…
2019-02-20 22:08:29,647 — INFO — PAI.paradox.paradox — Connecting to interface
2019-02-20 22:08:29,654 — DEBUG — PAI.paradox.connections.ip_connection — Authenticating with IP Module
2019-02-20 22:08:29,655 — DEBUG — PAI.paradox.connections.ip_connection — PC -> IP b’aa04000309f0000001eeeeeeeeeeeeee’xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
2019-02-20 22:08:34,909 — ERROR — PAI.paradox.connections.ip_connection — Unable to establish session with IP Module
Traceback (most recent call last):
File «C:paradox150pai-masterpai-masterparadoxconnectionsip_connection.py», line 138, in connect_to_panel
data = self.socket.recv(1024)
socket.timeout: timed out
2019-02-20 22:08:34,913 — ERROR — PAI.paradox.connections.ip_connection — Try 2/3. Unable to connect to IP Module
Traceback (most recent call last):
File «C:paradox150pai-masterpai-masterparadoxconnectionsip_connection.py», line 60, in connect
self.socket.connect((self.host, self.port))
OSError: [WinError 10056] A connect request was made on an already connected socket
2019-02-20 22:08:34,918 — ERROR — PAI.paradox.connections.ip_connection — Try 3/3. Unable to connect to IP Module
Traceback (most recent call last):
File «C:paradox150pai-masterpai-masterparadoxconnectionsip_connection.py», line 60, in connect
self.socket.connect((self.host, self.port))
OSError: [WinError 10056] A connect request was made on an already connected socket

it seems that after it sends the first packet after connecting to the module and tries to read stream from the socket, it receives the exception, cause there is nothing to read..i tries to put some delay in between send and recv but did not help.

import socket
serversocket=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
serversocket.bind(("localhost",8000))
serversocket.listen(5)
while True:
    (client,addr)=serversocket.accept()
    data=serversocket.recv(1024)
    print(data.decode("utf-8"))

import socket
s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("localhost",8000))

2 ответа

Лучший ответ

import socket
serversocket = socket.socket()
serversocket.bind(('',8000))
serversocket.listen(5)
while True:
    client,addr = serversocket.accept()
    while True:
        data = client.recv(1024)
        if not data: break
        print(data.decode('utf8')) # Note this might not contain a complete UTF-8 character.
    client.close()

Я хочу автоматизировать подключение. Столкнувшись с проблемой ниже при запуске кода. попытался добавить отключение, но это не сработало. Система подключается, и данные передаются. как только соединение потеряно и когда система пытается восстановить соединение, я сталкиваюсь с проблемой.

import socket,time
client=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
client.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
ip = '192.168.xx.x'
port = 4xxx
address = (ip,port)

def connect():
    try:
        while 1:
            print("connecting")
            try:
                client.connect(address)
                print("connected")
            except TimeoutError:
                print("wait for few mins")
                time.sleep(20)
                connect()
            break
    except ConnectionAbortedError:
        print("connection aborted wait for few sec")
        time.sleep(10)
        connect()    

connect()    
try:
    while 1:
        datasent = client.send(b'x01x04')
        if datasent:
            print("sent")
            data= client.recv(1024)
            print(data)
            time.sleep(5)
        if  not datasent:
            connect()


except ConnectionResetError:
    client.shutdown(socket.SHUT_RDWR)
    client.close()
    print("wait for 10 sec")
    time.sleep(10)
    connect()



    >Error: Traceback (most recent call last):
    File "C:UsersUsereclipse-workspaceDatackeckclient.py", line 28, in <module>
    datasent = client.send(b'x01x04') 
    ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
    File "C:UsersUsereclipse-workspaceDatackeckclient.py", line 41, in <module>
    connect()
    File "C:UsersUsereclipse-workspaceDatackeckclient.py", line 13, in connect
    client.connect(address)
    OSError: [WinError 10038] An operation was attempted on something that is not a socket

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