reports to be printed as IGMPv1, and a misapplied patch caused IGMP Leave messages to be partially interpreted as DVMRP routing messages.
Add support for the router-alert option. Submitted by: Bill Fenner <fenner@parc.xerox.com>
Obtained from: ftp://ftp.ee.lbl.gov/tcpdump.tar.Z on 19-Aug-1996.