author | Mike Kinghan <mikek@symbian.org> |
Thu, 25 Nov 2010 14:28:39 +0000 | |
branch | GCC_SURGE |
changeset 135 | 10852f1a0ae9 |
parent 1 | 2fb8b9db1c86 |
permissions | -rw-r--r-- |
1
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
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1 |
# A simple FTP client. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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2 |
# |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
3 |
# The information to write this program was gathered from RFC 959, |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
4 |
# but this is not a complete implementation! Yet it shows how a simple |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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5 |
# FTP client can be built, and you are welcome to extend it to suit |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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6 |
# it to your needs... |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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7 |
# |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
8 |
# How it works (assuming you've read the RFC): |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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9 |
# |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
10 |
# User commands are passed uninterpreted to the server. However, the |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
11 |
# user never needs to send a PORT command. Rather, the client opens a |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
12 |
# port right away and sends the appropriate PORT command to the server. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
diff
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|
13 |
# When a response code 150 is received, this port is used to receive |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
14 |
# the data (which is written to stdout in this version), and when the |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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|
15 |
# data is exhausted, a new port is opened and a corresponding PORT |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
16 |
# command sent. In order to avoid errors when reusing ports quickly |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
17 |
# (and because there is no s.getsockname() method in Python yet) we |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
18 |
# cycle through a number of ports in the 50000 range. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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19 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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20 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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21 |
import sys, posix, string |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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22 |
from socket import * |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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23 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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24 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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25 |
BUFSIZE = 1024 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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26 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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# Default port numbers used by the FTP protocol. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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28 |
# |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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29 |
FTP_PORT = 21 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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FTP_DATA_PORT = FTP_PORT - 1 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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31 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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# Change the data port to something not needing root permissions. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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33 |
# |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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34 |
FTP_DATA_PORT = FTP_DATA_PORT + 50000 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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35 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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36 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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# Main program (called at the end of this file). |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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38 |
# |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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39 |
def main(): |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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40 |
hostname = sys.argv[1] |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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41 |
control(hostname) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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42 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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43 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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44 |
# Control process (user interface and user protocol interpreter). |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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45 |
# |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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46 |
def control(hostname): |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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47 |
# |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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48 |
# Create control connection |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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49 |
# |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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|
50 |
s = socket(AF_INET, SOCK_STREAM) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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51 |
s.connect((hostname, FTP_PORT)) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
52 |
f = s.makefile('r') # Reading the replies is easier from a file... |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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53 |
# |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
54 |
# Control loop |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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55 |
# |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
56 |
r = None |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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57 |
while 1: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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58 |
code = getreply(f) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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|
59 |
if code in ('221', 'EOF'): break |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
60 |
if code == '150': |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
diff
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|
61 |
getdata(r) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
62 |
code = getreply(f) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
diff
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|
63 |
r = None |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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|
64 |
if not r: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
65 |
r = newdataport(s, f) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
diff
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|
66 |
cmd = getcommand() |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
diff
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|
67 |
if not cmd: break |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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68 |
s.send(cmd + '\r\n') |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
diff
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|
69 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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|
70 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
71 |
# Create a new data port and send a PORT command to the server for it. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
diff
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|
72 |
# (Cycle through a number of ports to avoid problems with reusing |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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|
73 |
# a port within a short time.) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
74 |
# |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
75 |
nextport = 0 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
76 |
# |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
77 |
def newdataport(s, f): |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
78 |
global nextport |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
79 |
port = nextport + FTP_DATA_PORT |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
80 |
nextport = (nextport+1) % 16 |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
81 |
r = socket(AF_INET, SOCK_STREAM) |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
82 |
r.bind((gethostbyname(gethostname()), port)) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
83 |
r.listen(1) |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
84 |
sendportcmd(s, f, port) |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
85 |
return r |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
86 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
87 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
88 |
# Send an appropriate port command. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
89 |
# |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
90 |
def sendportcmd(s, f, port): |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
91 |
hostname = gethostname() |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
92 |
hostaddr = gethostbyname(hostname) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
93 |
hbytes = string.splitfields(hostaddr, '.') |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
94 |
pbytes = [repr(port//256), repr(port%256)] |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
95 |
bytes = hbytes + pbytes |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
96 |
cmd = 'PORT ' + string.joinfields(bytes, ',') |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
97 |
s.send(cmd + '\r\n') |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
98 |
code = getreply(f) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
99 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
100 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
101 |
# Process an ftp reply and return the 3-digit reply code (as a string). |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
102 |
# The reply should be a line of text starting with a 3-digit number. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
103 |
# If the 4th char is '-', it is a multi-line reply and is |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
104 |
# terminate by a line starting with the same 3-digit number. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
105 |
# Any text while receiving the reply is echoed to the file. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
106 |
# |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
107 |
def getreply(f): |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
108 |
line = f.readline() |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
109 |
if not line: return 'EOF' |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
110 |
print line, |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
111 |
code = line[:3] |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
112 |
if line[3:4] == '-': |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
113 |
while 1: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
114 |
line = f.readline() |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
115 |
if not line: break # Really an error |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
116 |
print line, |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
117 |
if line[:3] == code and line[3:4] != '-': break |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
118 |
return code |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
119 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
120 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
121 |
# Get the data from the data connection. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
122 |
# |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
123 |
def getdata(r): |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
124 |
print '(accepting data connection)' |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
125 |
conn, host = r.accept() |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
126 |
print '(data connection accepted)' |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
127 |
while 1: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
128 |
data = conn.recv(BUFSIZE) |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
129 |
if not data: break |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
130 |
sys.stdout.write(data) |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
131 |
print '(end of data connection)' |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
132 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
133 |
# Get a command from the user. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
134 |
# |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
135 |
def getcommand(): |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
136 |
try: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
137 |
while 1: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
138 |
line = raw_input('ftp.py> ') |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
139 |
if line: return line |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
140 |
except EOFError: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
141 |
return '' |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
142 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
143 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
144 |
# Call the main program. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
145 |
# |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
146 |
main() |