From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Williamson Subject: [PATCH 4/5][RFC] virti-net: Enable filtering based on MAC, promisc, broadcast and allmulti Date: Wed, 07 Jan 2009 10:37:43 -0700 Message-ID: <1231349863.7109.83.camel@lappy> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: Mark McLoughlin To: kvm , qemu-devel Return-path: Received: from g1t0029.austin.hp.com ([15.216.28.36]:9360 "EHLO g1t0029.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753428AbZAGRhP (ORCPT ); Wed, 7 Jan 2009 12:37:15 -0500 Sender: kvm-owner@vger.kernel.org List-ID: virti-net: Enable filtering based on MAC, promisc, broadcast and allmulti Signed-off-by: Alex Williamson --- hw/virtio-net.c | 22 ++++++++++++++++++++++ 1 files changed, 22 insertions(+), 0 deletions(-) diff --git a/hw/virtio-net.c b/hw/virtio-net.c index 653cad4..fa8e71c 100644 --- a/hw/virtio-net.c +++ b/hw/virtio-net.c @@ -167,6 +167,25 @@ 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->status.bits.promisc) + return 1; + + if ((buf[0] & 1) && n->status.bits.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; @@ -176,6 +195,9 @@ 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);