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Edit File : udpecho.py \| Size : 1.43 KB
#! /usr/bin/python2.7 # 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() Back

Edit File : udpecho.py | Size : 1.43 KB

#! /usr/bin/python2.7

# 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()

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