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Name	Size	Permission	Date
README	628 B	-rwxr-xr-x	2025-01-08 14:12
broadcast.py	283 B	-rwxr-xr-x	2025-01-08 14:12
echosvr.py	748 B	-rwxr-xr-x	2025-01-08 14:12
finger.py	1.24 KB	-rwxr-xr-x	2025-01-08 14:12
ftp.py	3.84 KB	-rwxr-xr-x	2025-01-08 14:12
gopher.py	9.56 KB	-rwxr-xr-x	2025-01-08 14:12
mcast.py	2.17 KB	-rwxr-xr-x	2025-01-08 14:12
radio.py	287 B	-rwxr-xr-x	2025-01-08 14:12
rpython.py	723 B	-rwxr-xr-x	2025-01-08 14:12
rpythond.py	1.19 KB	-rwxr-xr-x	2025-01-08 14:12
telnet.py	2.95 KB	-rwxr-xr-x	2025-01-08 14:12
throughput.py	2.04 KB	-rwxr-xr-x	2025-01-08 14:12
udpecho.py	1.44 KB	-rwxr-xr-x	2025-01-08 14:12
unicast.py	230 B	-rwxr-xr-x	2025-01-08 14:12
unixclient.py	232 B	-rwxr-xr-x	2025-01-08 14:12
unixserver.py	414 B	-rwxr-xr-x	2025-01-08 14:12

Rename

#! /opt/alt/python27/bin/python

# Client and server for udp (datagram) echo.
#
# Usage: udpecho -s [port]            (to start a server)
# or:    udpecho -c host [port] <file (client)

import sys
from socket import *

ECHO_PORT = 50000 + 7
BUFSIZE = 1024

def main():
    if len(sys.argv) < 2:
        usage()
    if sys.argv[1] == '-s':
        server()
    elif sys.argv[1] == '-c':
        client()
    else:
        usage()

def usage():
    sys.stdout = sys.stderr
    print 'Usage: udpecho -s [port]            (server)'
    print 'or:    udpecho -c host [port] <file (client)'
    sys.exit(2)

def server():
    if len(sys.argv) > 2:
        port = eval(sys.argv[2])
    else:
        port = ECHO_PORT
    s = socket(AF_INET, SOCK_DGRAM)
    s.bind(('', port))
    print 'udp echo server ready'
    while 1:
        data, addr = s.recvfrom(BUFSIZE)
        print 'server received %r from %r' % (data, addr)
        s.sendto(data, addr)

def client():
    if len(sys.argv) < 3:
        usage()
    host = sys.argv[2]
    if len(sys.argv) > 3:
        port = eval(sys.argv[3])
    else:
        port = ECHO_PORT
    addr = host, port
    s = socket(AF_INET, SOCK_DGRAM)
    s.bind(('', 0))
    print 'udp echo client ready, reading stdin'
    while 1:
        line = sys.stdin.readline()
        if not line:
            break
        s.sendto(line, addr)
        data, fromaddr = s.recvfrom(BUFSIZE)
        print 'client received %r from %r' % (data, fromaddr)

main()