MSEND(8) - System Manager's Manual (smm)
msend - send UDP messages to a multicast group
msend [-46hnvq] [-c NUM] [-g GROUP] [-join] [-i ADDRESS] [-I INTERFACE] [-p PORT] [-P PERIOD] [-t TTL] [-text 'text']
Continuously send UDP packets to the multicast group specified by the -g and -p options.
-4
Select IPv4 test group, use with -I IFACE when not using -i ADDRESS or any -g GROUP. This is the default.
-6
Select IPv6 test group when not using or -g. For an example, see below.
-c NUM
Limit number of packets to send, default: unlimited.
-g GROUP
Specify the IP multicast group address to which the packets are sent. The default group for IPv4 is 224.1.1.1 and for IPv6 ff2e::1.
-p PORT
Specify the UDP port number used by the multicast group. The default port number is 4444.
-join
Multicast sender will join join the multicast group. By default, a multicast sender does not (need to) join the group.
-t TTL
Specify the TTL (1-255) value in the message. You must increase this if you want to route the traffic, otherwise the first router will drop the packets! The default value is 1.
-i ADDRESS
Specify the IP address of the interface to be used to send the packets. The default value is INADDR_ANY which implies that the default interface selected by the system will be used.
-I INTERFACE
The interface on which to send. Can be specified as an alternative to -i.
-P PERIOD
Specify the interval in milliseconds between two transmitted packets. The default value is 1000 milliseconds.
-q
Quiet mode, do not log to stdout every time a message is successfully sent. Errors are stil logged.
-text 'text'
Specify a message text which is sent as the payload of the packets and is displayed by the mreceive(8) command. The default value is an empty string.
-n
Interpret the contents of the message text as a number instead of a string of characters. Use mreceive -n on the other end to interpret the message text correctly.
-v
Print version information.
-h
Print the command usage.
$ msend -6 -I eth0
Now sending to multicast group: [ff2e::1]:4444
Sending msg 1, TTL 1, to [ff2e::1]:4444:
Sending msg 2, TTL 1, to [ff2e::1]:4444:
Sending msg 3, TTL 1, to [ff2e::1]:4444:
Sending msg 4, TTL 1, to [ff2e::1]:4444:
Sending msg 5, TTL 1, to [ff2e::1]:4444:
mreceive(8)
mtools, originally called mSendReceive, was written by Jianping Wang, Yvan Pointurier, and Jörg Liebeherr while at University of Virginia's Multimedia Networks Group. It is currently maintained by Joachim Wiberg at GitHub.
Debian - November 11, 2024