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MTEST(8)		  BSD System Manager's Manual		      MTEST(8)

NAME
     mtest — test multicast socket operations

SYNOPSIS
     mtest

DESCRIPTION
     The mtest utility is a small program for testing multicast socket opera‐
     tions.

     It accepts the following commands, interactively, or as part of a
     scripted input file (useful for automated testing):

	   a ifname mac-addr	     Join the link-layer group address
				     mac-addr on interface ifname.  The group
				     address should be in IEEE 802 MAC format,
				     delimited by colon (':') characters.
	   d ifname mac-addr	     Leave the link-layer group address
				     mac-addr on interface ifname.
	   m ifname 1/0		     Set or reset ALLMULTI mode on interface
				     ifname.  This option is deprecated and is
				     now a no-op.
	   p ifname 1/0		     Set or reset promiscuous mode on inter‐
				     face ifname.

	   j mcast-addr ifname [source-addr]
				     Join the multicast address mcast-addr on
				     the interface with name ifname.

				     If an optional source source-addr is
				     specified, a source-specific join will be
				     performed; if mtest is already joined to
				     the multicast address, the source will be
				     added to its filter list.

	   l mcast-addr ifname [source-addr]
				     Leave the multicast address mcast-addr on
				     the interface with address ifname.	 If a
				     source source-addr is specified, only
				     that source will be left.
	   i mcast-addr ifname n source-addr ...
				     Set the socket with membership of
				     mcast-addr on interface ifname to include
				     filter mode, and add n sources beginning
				     with source-addr to the inclusion filter
				     list.
	   e mcast-addr ifname n source-addr ...
				     Set the socket with membership of
				     mcast-addr on interface ifname to exclude
				     filter mode, and add n sources beginning
				     with source-addr to the exclusion filter
				     list.
	   t mcast-addr ifname source-addr
				     Set the socket with membership of
				     mcast-addr on interface ifname to block
				     traffic from source source-addr.
	   b mcast-addr ifname source-addr
				     Set the socket with membership of
				     mcast-addr on interface ifname to allow
				     traffic from source source-addr.

	   g mcast-addr ifname n     Print n source filter entries for
				     mcast-addr on interface ifname.

	   f filename		     Read commands from the file filename.
	   s n			     Sleep for n seconds.
	   ?			     List legal commands.
	   q			     Quit the program.

IMPLEMENTATION NOTES
     For each command implemented by mtest, the address family of each argu‐
     ment must be identical; it is not possible to mix IPv4 multicast member‐
     ships with IPv6, for example.

     To support IPv6, all commands have now changed to accept an interface
     name rather than an interface address.  For IPv4, the program will per‐
     form a lookup of the primary IP address based on the interface name.
     This may fail if no primary IP address is assigned.

SEE ALSO
     D. Thaler, B. Fenner, and B. Quinn, Socket Interface Extensions for
     Multicast Filters, RFC 3678.

AUTHORS
     Bruce Simpson
     Steve Deering
     Wilbert De Graaf

BSD				April 29, 2009				   BSD
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