From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Williamson Subject: [PATCH 4/5] virtio-net: Enable filtering based on MAC, promisc, broadcast and allmulti Date: Tue, 13 Jan 2009 14:23:54 -0700 Message-ID: <1231881834.9095.194.camel@bling> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: qemu-devel , Mark McLoughlin To: kvm Return-path: Received: from g1t0029.austin.hp.com ([15.216.28.36]:31443 "EHLO g1t0029.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753540AbZAMVYW (ORCPT ); Tue, 13 Jan 2009 16:24:22 -0500 Sender: kvm-owner@vger.kernel.org List-ID: Signed-off-by: Alex Williamson --- qemu/hw/virtio-net.c | 22 ++++++++++++++++++++++ 1 files changed, 22 insertions(+), 0 deletions(-) diff --git a/qemu/hw/virtio-net.c b/qemu/hw/virtio-net.c index c5d9952..99e582f 100644 --- a/qemu/hw/virtio-net.c +++ b/qemu/hw/virtio-net.c @@ -273,6 +273,25 @@ static int receive_header(VirtIONet *n, struct iovec *iov, int iovcnt, return offset; } +static int receive_filter(VirtIONet *n, const uint8_t *buf, int size) +{ + static uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; + + if (n->promisc) + return 1; + + if ((buf[0] & 1) && n->allmulti) + return 1; + + if (!memcmp(buf, bcast, sizeof(bcast))) + return 1; + + if (!memcmp(buf, n->mac, 6)) + return 1; + + return 0; +} + static void virtio_net_receive(void *opaque, const uint8_t *buf, int size) { VirtIONet *n = opaque; @@ -282,6 +301,9 @@ static void virtio_net_receive(void *opaque, const uint8_t *buf, int size) if (!do_virtio_net_can_receive(n, size)) return; + if (!receive_filter(n, buf, size)) + return; + /* hdr_len refers to the header we supply to the guest */ hdr_len = n->mergeable_rx_bufs ? sizeof(struct virtio_net_hdr_mrg_rxbuf) : sizeof(struct virtio_net_hdr);