客户端套接字无法连接到服务器套接字，[Errno 32]管道损坏错误

Question

I have written a client-server python program where the client can send the data to the server. But when the client is trying to connect with the server I am getting the following error.

[Errno 110] Connection timed out
Sending Key to Server
Traceback (most recent call last):
   File "client.py", line 43, in <module>
       s.send(str(id))
socket.error: [Errno 32] Broken pipe

I tried the following solutions Broken Pipe error and How to prevent Broken pipe error but none of them solved the issue.

Here are my client and server code

client.py

import socket
import os
import subprocess
from optparse import OptionParser
from random import randint 

try:
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)   
    print "Socket has been successfully created"
except socket.error as err:
    print "socket creation failed with error %s" %(err)

# The Manager Address and port 

host_ip='192.168.43.123'
port =10106

# Generates a random number say xxxx then its client id becomes 'clxxxx' and home directory made at the server as '/home/clxxxx' with permissions 700
def random_with_N_digits(n):
    range_start = 10**(n-1)
    range_end = (10**n)-1
    return randint(range_start, range_end)

id=random_with_N_digits(4)
id="cl"+ str(id)

# Looks for a public key in .ssh folder if temp.pub not present. If not found generates a ssh public private key and sends it to manager which then copies it to the server
subprocess.call(["bash","keygen.sh"])


#s = socket.socket()

try:
    s.connect((host_ip,port))
    print "the socket has successfully connected to Backup Server IP == %s" %(host_ip)

except socket.error as err:
    print err

f = open('temp.pub','r')
print "Sending Key to Server"

j = "-"
s.send(str(id))
l=f.read(8192)
while(l):
    print 'Sending...'
    s.send(l)
    l = f.read(8192)

try:
    client_id=s.recv(1024)
    data=s.recv(12)
    ip=s.recv(24)
    print  client_id,
    print  data, ip
except:
    print "An Unknown Error Occurred!"

f.close()

# Writes the parameters of client in the file 'backup_dir.txt'
with open('backup_dir.txt','w') as the_file:
    the_file.write(client_id)
    the_file.write('\n')
    the_file.write(data)
    the_file.write('\n')
    the_file.write(ip)
    the_file.write('\n')
f.close()


s.close()

server.py

import socket
import subprocess
import os

try:
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)   
    print "Socket has been successfully created"
except socket.error as err:
    print "socket creation failed with error %s" %(err)

port = 10106

s.bind(('', port))
print("socket binded to %s port" %port)

s.listen(10)
print("socket is listening")

while(True):
    print("waiting for a connection")
    c, addr = s.accept()
    print("Got a connection from", addr,c)
    clientID =(c.recv(8192))
    key =(c.recv(8192))
    print clientID
    print key

    with open("temp.pub", 'w') as fp:
        fp.write(key)
    note=subprocess.check_output("./test_user.sh "+ clientID, shell=True)
    note = str(note)
    print(len(note))
    flag, path, serverIP = note.split(":")
    print(flag)
    print(path)
    print(serverIP)
    if flag:
        c.send(clientID)
        c.send(path)
        c.send(serverIP)
        os.remove("temp.pub")
    else:
        c.send("Unable to add Client.")

How do I fix this problem so that the client can send the data to the server without any error? Thank You in advance.

Answer 1

The error resolved.
It was due to the firewall issue as @RaymondNijland was mentioning, Thanks.
I added the rule in the firewall to allow the following port for Socket Connection and it worked.

sudo ufw allow 10106