In order to become familiar with multicast implementation using FreeBSD, I found via Google a pair of test programs which multicast sent a simple text message and received the text message. I added some code to report the source address, because none of the references that I looked at specified the source IP address in the frame.
I ran the sender on A -current system, AMD64 vintage last week. The receiver was on a -current system I386 vintage last week. TCPDUMP shows the source IP address in the frame as (correctly) 192.168.0.15. The receiver reports the source IP address as 200.231.191.191. I have also run the same test with an OpenBSD 4.4 Release I386 system as the receiver. The openBSD system reports the sender as 192.168.0.15. A Fedora 10 system reported the source IP address as 0.0.0.0. Googling the RFCs and other information and referring to Comer's and Stevens' books on TCPIP I can't determine what should be reported. Does anybody have clue for me? -- Best regards, Derek Tattersall [email protected] [email protected] [email protected] _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[email protected]"
