Socket error: 10053 software caused connection abort

[Jean-Pierre Bergamin]

Hello there

I'm getting an error on Windows XP when I send big data chunks over a socket
connection. The exception I get is: "socket.error: (10053, 'Software caused
connection abort')"
This happens in the socket.recv function.

What I found out is that such errors can occur if there's not enough buffer
for receiving data in the underlying hardware.
On Linux it works fine. I guess, that the socket-code on windows could be
buggy and tries to read from a buffer whithout checking the length.

The server.py script does not alway receive all the data that was sent by
the client.

I'd be glad if someone could test theses scripts to see if this error also
occurs on other coputers and systems.

Or is there anything wrong with the code?


Regards

James

======================================================
server.py
======================================================
import SocketServer

class MyHandler(SocketServer.StreamRequestHandler):
 def get_all(self):
  # Get data as long as there's something on the line
  data = ''
  block_size = 1024
  while(1):
   chunk = self.connection.recv(block_size)
   if not chunk:
    break

   data += chunk

   if (len(chunk) < block_size):
    # We got all the data
    break

  return data

 def handle(self):
  data = self.get_all()

  data_len = len(data)

  if (data_len == 0):
   return

  print "Received: %d" % data_len

  total_sent = 0
  while(total_sent < data_len):
   sent = self.connection.send(data)
   if not sent:
    break

   data = data[sent:]
   total_sent += sent

try:
 s = SocketServer.TCPServer(('', 12345), MyHandler)
 s.serve_forever()
except Error, msg:
 print msg


======================================================
client.py
======================================================
import sys
import socket
from time import sleep

port = 12345
host = 'localhost'
loops = 100
data_len = 12000
send_data = 'x' * data_len
to_send = len(send_data)

for _ in range(loops):
 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 s.connect(("localhost", port))
 total_sent = 0
 while(total_sent < to_send):
  sent = s.send(send_data)
  if not sent:
   break;
  print "Sent: %d" % sent
  total_sent += sent

 print "Total-sent: %d" % total_sent

 # Get data as long as there's something on the line
 data = ''

 block_size = 1024

 while(1):
  got = s.recv(block_size)

  if not got:
   print "Connection broken"
   break

  data += got

  if (len(got) < block_size):
   # We got all the data
   break

 data_len = len(data)
 s.close()
 print 'Received bytes: %d' % len(data)