-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Jim C. Brown schrieb: > On Fri, Sep 30, 2005 at 03:13:21PM -0700, Don Kitchen wrote: > [...] > >>I'm interested in the handling of ethernet frames because I haven't been >>able to get the bridge to pass packets between added interfaces (yes, >>they're all up and promisc) and I'm not too thrilled with networking being >>bridged anyway, > > > Do you mean the kernel bridge, br0? Or are you talking about some sort of > user space bridge, like bridged (which uses a series of packet sockets to > bridge between multiple ethernet (ethX) devices) ? > > >>and it seems to me that if an fd were hooked up to a >>BPF capturing everything from the real ethernet device in promiscuous >>mode, and pushing out any raw frames it receives, that I could bypass >>the bridge and make it as if the emulator's virtual ethernet device is >>a real one. Or is there some reason this won't work? (after all, other >>products don't have this, there must be a reason right?) > > > Ah, you're talking about using a packet socket, right? > > That works fine for the most part. There is one thing that you have missed > though: guest->host communication doesn't work when you do that. > > When you push out a raw frame, it leaves the real ethernet device before the > host sees it. So guest->host doesn't work. You need to find another way to > send packets from the guest to the host. Most host OSes will not let you > do this at all. (Windows seems to be the exception, winpcap's > pcap_sendpacket() > appears to work fine for that job.) >
That means it would work if the host NIC is connected to a switch? Then the switch would send packets from the guest which are meant for the host back to the host NIC and everything's fine! Or did I misunderstand that now? Regards, Oliver Gerlich -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFDPnM2TFOM6DcNJ6cRAlTaAJ9gxN9CUnSEeKl5lPbURTEh33Rl8QCgpmNV cUuiGGOkpPVYxzeo9ZoksWM= =tEkV -----END PGP SIGNATURE----- _______________________________________________ Qemu-devel mailing list Qemu-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/qemu-devel
