FM / sockets

/usr/lib64/python2.6/Demo/sockets

Name	Size	Mode	Actions
broadcast.py	283	0644	edit dl rm
broadcast.pyc	546	0644	edit dl rm
broadcast.pyo	546	0644	edit dl rm
echosvr.py	742	0755	edit dl rm
echosvr.pyc	830	0644	edit dl rm
echosvr.pyo	830	0644	edit dl rm
finger.py	1263	0755	edit dl rm
finger.pyc	1174	0644	edit dl rm
finger.pyo	1174	0644	edit dl rm
ftp.py	3928	0644	edit dl rm
ftp.pyc	2973	0644	edit dl rm
ftp.pyo	2973	0644	edit dl rm
gopher.py	9787	0755	edit dl rm
gopher.pyc	10427	0644	edit dl rm
gopher.pyo	10427	0644	edit dl rm
mcast.py	2387	0644	edit dl rm
mcast.pyc	2094	0644	edit dl rm
mcast.pyo	2094	0644	edit dl rm
radio.py	287	0644	edit dl rm
radio.pyc	470	0644	edit dl rm
radio.pyo	470	0644	edit dl rm
README	814	0644	edit dl rm
rpython.py	717	0755	edit dl rm
rpython.pyc	987	0644	edit dl rm
rpython.pyo	987	0644	edit dl rm
rpythond.py	1217	0755	edit dl rm
rpythond.pyc	1337	0644	edit dl rm
rpythond.pyo	1337	0644	edit dl rm
telnet.py	3013	0755	edit dl rm
telnet.pyc	2182	0644	edit dl rm
telnet.pyo	2182	0644	edit dl rm
throughput.py	2088	0755	edit dl rm
throughput.pyc	2489	0644	edit dl rm
throughput.pyo	2489	0644	edit dl rm
udpecho.py	1471	0755	edit dl rm
udpecho.pyc	2039	0644	edit dl rm
udpecho.pyo	2039	0644	edit dl rm
unicast.py	230	0644	edit dl rm
unicast.pyc	455	0644	edit dl rm
unicast.pyo	455	0644	edit dl rm
unixclient.py	232	0644	edit dl rm
unixclient.pyc	424	0644	edit dl rm
unixclient.pyo	424	0644	edit dl rm
unixserver.py	414	0644	edit dl rm
unixserver.pyc	599	0644	edit dl rm
unixserver.pyo	599	0644	edit dl rm

Edit: /usr/lib64/python2.6/Demo/sockets/telnet.py (3013B)

#! /usr/bin/env python2.6

# Minimal interface to the Internet telnet protocol.
#
# It refuses all telnet options and does not recognize any of the other
# telnet commands, but can still be used to connect in line-by-line mode.
# It's also useful to play with a number of other services,
# like time, finger, smtp and even ftp.
#
# Usage: telnet host [port]
#
# The port may be a service name or a decimal port number;
# it defaults to 'telnet'.

import sys, posix, time
from socket import *

BUFSIZE = 1024

# Telnet protocol characters

IAC  = chr(255) # Interpret as command
DONT = chr(254)
DO   = chr(253)
WONT = chr(252)
WILL = chr(251)

def main():
    host = sys.argv[1]
    try:
        hostaddr = gethostbyname(host)
    except error:
        sys.stderr.write(sys.argv[1] + ': bad host name\n')
        sys.exit(2)
    #
    if len(sys.argv) > 2:
        servname = sys.argv[2]
    else:
        servname = 'telnet'
    #
    if '0' <= servname[:1] <= '9':
        port = eval(servname)
    else:
        try:
            port = getservbyname(servname, 'tcp')
        except error:
            sys.stderr.write(servname + ': bad tcp service name\n')
            sys.exit(2)
    #
    s = socket(AF_INET, SOCK_STREAM)
    #
    try:
        s.connect((host, port))
    except error, msg:
        sys.stderr.write('connect failed: ' + repr(msg) + '\n')
        sys.exit(1)
    #
    pid = posix.fork()
    #
    if pid == 0:
        # child -- read stdin, write socket
        while 1:
            line = sys.stdin.readline()
            s.send(line)
    else:
        # parent -- read socket, write stdout
        iac = 0         # Interpret next char as command
        opt = ''        # Interpret next char as option
        while 1:
            data = s.recv(BUFSIZE)
            if not data:
                # EOF; kill child and exit
                sys.stderr.write( '(Closed by remote host)\n')
                posix.kill(pid, 9)
                sys.exit(1)
            cleandata = ''
            for c in data:
                if opt:
                    print ord(c)
                    s.send(opt + c)
                    opt = ''
                elif iac:
                    iac = 0
                    if c == IAC:
                        cleandata = cleandata + c
                    elif c in (DO, DONT):
                        if c == DO: print '(DO)',
                        else: print '(DONT)',
                        opt = IAC + WONT
                    elif c in (WILL, WONT):
                        if c == WILL: print '(WILL)',
                        else: print '(WONT)',
                        opt = IAC + DONT
                    else:
                        print '(command)', ord(c)
                elif c == IAC:
                    iac = 1
                    print '(IAC)',
                else:
                    cleandata = cleandata + c
            sys.stdout.write(cleandata)
            sys.stdout.flush()

try:
    main()
except KeyboardInterrupt:
    pass

cmd: