FM / sockets

/usr/lib64/python2.7/Demo/sockets

Name	Size	Mode	Actions
broadcast.py	283	0644	edit dl rm
broadcast.pyc	547	0644	edit dl rm
broadcast.pyo	547	0644	edit dl rm
echosvr.py	738	0755	edit dl rm
echosvr.pyc	827	0644	edit dl rm
echosvr.pyo	827	0644	edit dl rm
finger.py	1259	0755	edit dl rm
finger.pyc	1162	0644	edit dl rm
finger.pyo	1162	0644	edit dl rm
ftp.py	3928	0644	edit dl rm
ftp.pyc	2954	0644	edit dl rm
ftp.pyo	2954	0644	edit dl rm
gopher.py	9783	0755	edit dl rm
gopher.pyc	10323	0644	edit dl rm
gopher.pyo	10323	0644	edit dl rm
mcast.py	2214	0755	edit dl rm
mcast.pyc	2169	0644	edit dl rm
mcast.pyo	2169	0644	edit dl rm
radio.py	287	0644	edit dl rm
radio.pyc	471	0644	edit dl rm
radio.pyo	471	0644	edit dl rm
README	628	0644	edit dl rm
rpython.py	713	0755	edit dl rm
rpython.pyc	982	0644	edit dl rm
rpython.pyo	982	0644	edit dl rm
rpythond.py	1213	0755	edit dl rm
rpythond.pyc	1335	0644	edit dl rm
rpythond.pyo	1335	0644	edit dl rm
telnet.py	3009	0755	edit dl rm
telnet.pyc	2149	0644	edit dl rm
telnet.pyo	2149	0644	edit dl rm
throughput.py	2084	0755	edit dl rm
throughput.pyc	2473	0644	edit dl rm
throughput.pyo	2473	0644	edit dl rm
udpecho.py	1467	0755	edit dl rm
udpecho.pyc	2027	0644	edit dl rm
udpecho.pyo	2027	0644	edit dl rm
unicast.py	230	0644	edit dl rm
unicast.pyc	456	0644	edit dl rm
unicast.pyo	456	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	593	0644	edit dl rm
unixserver.pyo	593	0644	edit dl rm

Edit: /usr/lib64/python2.7/Demo/sockets/telnet.py (3009B)

#! /usr/bin/python2.7

# 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: