How to send from a multicast group in python

Clumsy Corncrake answered on November 25, 2023 Popularity 1/10 Helpfulness 1/10

answer How to send from a multicast group in python

related How to receive from a multicast group in python

How to send from a multicast group in python

Comment

import socket

MCAST_GRP = '224.1.1.1'
MCAST_PORT = 5007
# regarding socket.IP_MULTICAST_TTL
# ---------------------------------
# for all packets sent, after two hops on the network the packet will not 
# be re-sent/broadcast (see https://www.tldp.org/HOWTO/Multicast-HOWTO-6.html)
MULTICAST_TTL = 2

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, MULTICAST_TTL)

# For Python 3, change next line to 'sock.sendto(b"robot", ...' to avoid the
# "bytes-like object is required" msg (https://stackoverflow.com/a/42612820)
sock.sendto("robot", (MCAST_GRP, MCAST_PORT))

Popularity 1/10 Helpfulness 1/10 Language python

Source: stackoverflow.com

Tags: group multicast python send

Link to this answer
Share Copy Link

Contributed on Nov 25 2023

Clumsy Corncrake

0 Answers Avg Quality 2/10

Closely Related Answers

How to receive from a multicast group in python

Comment

import socket
import struct

MCAST_GRP = '224.1.1.1'
MCAST_PORT = 5007
IS_ALL_GROUPS = True

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
if IS_ALL_GROUPS:
    # on this port, receives ALL multicast groups
    sock.bind(('', MCAST_PORT))
else:
    # on this port, listen ONLY to MCAST_GRP
    sock.bind((MCAST_GRP, MCAST_PORT))
mreq = struct.pack("4sl", socket.inet_aton(MCAST_GRP), socket.INADDR_ANY)

sock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)

while True:
  # For Python 3, change next line to "print(sock.recv(10240))"
  print sock.recv(10240)

Popularity 1/10 Helpfulness 1/10 Language python

Source: stackoverflow.com

Tags: group multicast python

Link to this answer
Share Copy Link

Contributed on Nov 25 2023

Clumsy Corncrake

0 Answers Avg Quality 2/10

How to send from a multicast group in python

Contents

More Related Answers

How to send from a multicast group in python

Closely Related Answers

How to receive from a multicast group in python

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.