Gecko [ armaneco.co.uk ]

Name	Size	Permission	Date
README	628 B	-rw-r--r--	2013-05-12 08:02
broadcast.py	283 B	-rw-r--r--	2013-05-12 08:02
broadcast.pyc	546 B	-rw-r--r--	2025-11-12 17:55
broadcast.pyo	546 B	-rw-r--r--	2025-11-12 17:55
echosvr.py	739 B	-rwxr-xr-x	2013-05-12 08:02
echosvr.pyc	826 B	-rw-r--r--	2025-11-12 17:55
echosvr.pyo	826 B	-rw-r--r--	2025-11-12 17:55
finger.py	1.23 KB	-rwxr-xr-x	2013-05-12 08:02
finger.pyc	1.13 KB	-rw-r--r--	2025-11-12 17:55
finger.pyo	1.13 KB	-rw-r--r--	2025-11-12 17:55
ftp.py	3.84 KB	-rw-r--r--	2013-05-12 08:02
ftp.pyc	2.88 KB	-rw-r--r--	2025-11-12 17:55
ftp.pyo	2.88 KB	-rw-r--r--	2025-11-12 17:55
gopher.py	9.55 KB	-rwxr-xr-x	2013-05-12 08:02
gopher.pyc	10.08 KB	-rw-r--r--	2025-11-12 17:55
gopher.pyo	10.08 KB	-rw-r--r--	2025-11-12 17:55
mcast.py	2.16 KB	-rwxr-xr-x	2025-11-12 17:53
mcast.pyc	2.12 KB	-rw-r--r--	2025-11-12 17:55
mcast.pyo	2.12 KB	-rw-r--r--	2025-11-12 17:55
radio.py	287 B	-rw-r--r--	2013-05-12 08:02
radio.pyc	470 B	-rw-r--r--	2025-11-12 17:55
radio.pyo	470 B	-rw-r--r--	2025-11-12 17:55
rpython.py	714 B	-rwxr-xr-x	2013-05-12 08:02
rpython.pyc	981 B	-rw-r--r--	2025-11-12 17:55
rpython.pyo	981 B	-rw-r--r--	2025-11-12 17:55
rpythond.py	1.19 KB	-rwxr-xr-x	2013-05-12 08:02
rpythond.pyc	1.3 KB	-rw-r--r--	2025-11-12 17:55
rpythond.pyo	1.3 KB	-rw-r--r--	2025-11-12 17:55
telnet.py	2.94 KB	-rwxr-xr-x	2013-05-12 08:02
telnet.pyc	2.1 KB	-rw-r--r--	2025-11-12 17:55
telnet.pyo	2.1 KB	-rw-r--r--	2025-11-12 17:55
throughput.py	2.04 KB	-rwxr-xr-x	2013-05-12 08:02
throughput.pyc	2.41 KB	-rw-r--r--	2025-11-12 17:55
throughput.pyo	2.41 KB	-rw-r--r--	2025-11-12 17:55
udpecho.py	1.43 KB	-rwxr-xr-x	2013-05-12 08:02
udpecho.pyc	1.98 KB	-rw-r--r--	2025-11-12 17:55
udpecho.pyo	1.98 KB	-rw-r--r--	2025-11-12 17:55
unicast.py	230 B	-rw-r--r--	2013-05-12 08:02
unicast.pyc	455 B	-rw-r--r--	2025-11-12 17:55
unicast.pyo	455 B	-rw-r--r--	2025-11-12 17:55
unixclient.py	232 B	-rw-r--r--	2013-05-12 08:02
unixclient.pyc	424 B	-rw-r--r--	2025-11-12 17:55
unixclient.pyo	424 B	-rw-r--r--	2025-11-12 17:55
unixserver.py	414 B	-rw-r--r--	2013-05-12 08:02
unixserver.pyc	593 B	-rw-r--r--	2025-11-12 17:55
unixserver.pyo	593 B	-rw-r--r--	2025-11-12 17:55

Rename

#! /usr/bin/env python
#
# Send/receive UDP multicast packets.
# Requires that your OS kernel supports IP multicast.
#
# Usage:
#   mcast -s (sender, IPv4)
#   mcast -s -6 (sender, IPv6)
#   mcast    (receivers, IPv4)
#   mcast  -6  (receivers, IPv6)

MYPORT = 8123
MYGROUP_4 = '225.0.0.250'
MYGROUP_6 = 'ff15:7079:7468:6f6e:6465:6d6f:6d63:6173'
MYTTL = 1 # Increase to reach other networks

import time
import struct
import socket
import sys

def main():
    group = MYGROUP_6 if "-6" in sys.argv[1:] else MYGROUP_4

if "-s" in sys.argv[1:]:
        sender(group)
    else:
        receiver(group)

def sender(group):
    addrinfo = socket.getaddrinfo(group, None)[0]

s = socket.socket(addrinfo[0], socket.SOCK_DGRAM)

# Set Time-to-live (optional)
    ttl_bin = struct.pack('@i', MYTTL)
    if addrinfo[0] == socket.AF_INET: # IPv4
        s.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, ttl_bin)
    else:
        s.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_MULTICAST_HOPS, ttl_bin)

while True:
        data = repr(time.time())
        s.sendto(data + '\0', (addrinfo[4][0], MYPORT))
        time.sleep(1)

def receiver(group):
    # Look up multicast group address in name server and find out IP version
    addrinfo = socket.getaddrinfo(group, None)[0]

# Create a socket
    s = socket.socket(addrinfo[0], socket.SOCK_DGRAM)

# Allow multiple copies of this program on one machine
    # (not strictly needed)
    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

# Bind it to the port
    s.bind(('', MYPORT))

group_bin = socket.inet_pton(addrinfo[0], addrinfo[4][0])
    # Join group
    if addrinfo[0] == socket.AF_INET: # IPv4
        mreq = group_bin + struct.pack('=I', socket.INADDR_ANY)
        s.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)
    else:
        mreq = group_bin + struct.pack('@I', 0)
        s.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_JOIN_GROUP, mreq)

# Loop, printing any data we receive
    while True:
        data, sender = s.recvfrom(1500)
        while data[-1:] == '\0': data = data[:-1] # Strip trailing \0's
        print (str(sender) + '  ' + repr(data))

if __name__ == '__main__':
    main()