import sys
import time
import socket
import os
#----------------------------------------------------------------------
# udp echo server
#----------------------------------------------------------------------
def udp_echo_server(ip, port):
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
if sys.platform[:3] != 'win':
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
BUF_SIZE = 8 * 1024 * 1024
sock.setsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF, BUF_SIZE)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, BUF_SIZE)
#print sock.getsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF)
#print sock.getsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF)
try:
sock.bind((ip, port))
except socket.error, e:
sys.stderr.write('bind (%s, %d) failed: %s'%(ip, port, str(e)))
sock.close()
return -1
print 'listening udp on ("%s", %d)'%(ip, port)
while True:
try:
data, remote = sock.recvfrom(8192)
except socket.error, e:
continue
try:
sock.sendto(data, remote)
except socket.error, e:
pass
return 0
#----------------------------------------------------------------------
# entry
#----------------------------------------------------------------------
def main(args = None):
if args == None:
args = [ n for n in sys.argv ]
import optparse
p = optparse.OptionParser('usage: %prog [options] to start cron')
p.add_option('-p', '--port', dest = 'port', help = 'config port number')
p.add_option('-i', '--ip', dest = 'ip', help = 'config ip address')
options, args = p.parse_args(args)
if options.port is None:
print >>sys.stderr, 'no port given, Try --help for more information.'
return 1
if options.ip is None:
print >>sys.stderr, 'no ip given, Try --help for more information.'
return 1
udp_echo_server(options.ip, int(options.port))
return 0
#----------------------------------------------------------------------
# testing case
#----------------------------------------------------------------------
if __name__ == '__main__':
#main(['', '--port=2015', '--ip=0.0.0.0'])
main()
