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Add -b option and sleep shorter.

This commit is contained in:
Guido van Rossum 1992-09-24 10:33:16 +00:00
parent 590177bc88
commit c8833d4ad3
1 changed files with 15 additions and 9 deletions
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24
Demo/sockets/mcast.py
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@ -2,6 +2,7 @@
# After /usr/people/4Dgifts/examples/network/mcast.c # After /usr/people/4Dgifts/examples/network/mcast.c
# Usage: # Usage:
# mcast -s (sender) # mcast -s (sender)
# mcast -b (sender, using broadcast instead multicast)
# mcast (receivers) # mcast (receivers)
MYPORT = 8123 MYPORT = 8123
@ -14,21 +15,26 @@
from SOCKET import * from SOCKET import *
from IN import * from IN import *
sender = (sys.argv[1:2] == ['-s']) sender = sys.argv[1:]
s = socket(AF_INET, SOCK_DGRAM) s = socket(AF_INET, SOCK_DGRAM)
if sender: if sender:
# Ugly: construct decimal IP address string from MYGROUP_BYTES if sys.argv[1] == '-b':
mygroup = '' s.setsockopt(SOL_SOCKET, SO_BROADCAST, 1)
for byte in MYGROUP_BYTES: mygroup = mygroup + '.' + `byte` mygroup = '<broadcast>'
mygroup = mygroup[1:] else:
ttl = struct.pack('b', 1) # Time-to-live # Ugly: construct decimal IP address string from MYGROUP_BYTES
s.setsockopt(IPPROTO_IP, IP_MULTICAST_TTL, ttl) mygroup = ''
for byte in MYGROUP_BYTES: mygroup = mygroup + '.' + `byte`
mygroup = mygroup[1:]
ttl = struct.pack('b', 1) # Time-to-live
s.setsockopt(IPPROTO_IP, IP_MULTICAST_TTL, ttl)
while 1: while 1:
data = `time.time()` + '\n' data = `time.time()`
## data = data + (1400 - len(data)) * '\0'
s.sendto(data, (mygroup, MYPORT)) s.sendto(data, (mygroup, MYPORT))
time.sleep(5) time.sleep(1)
else: else:
# Bind the socket to my port # Bind the socket to my port
s.bind('', MYPORT) s.bind('', MYPORT)