From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LKcLF-0002Kg-Tt for qemu-devel@nongnu.org; Wed, 07 Jan 2009 12:37:17 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LKcLF-0002K4-5S for qemu-devel@nongnu.org; Wed, 07 Jan 2009 12:37:17 -0500 Received: from [199.232.76.173] (port=33249 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LKcLF-0002Jo-02 for qemu-devel@nongnu.org; Wed, 07 Jan 2009 12:37:17 -0500 Received: from g1t0029.austin.hp.com ([15.216.28.36]:9359) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1LKcLE-0004WV-HG for qemu-devel@nongnu.org; Wed, 07 Jan 2009 12:37:16 -0500 From: Alex Williamson Content-Type: text/plain Date: Wed, 07 Jan 2009 10:37:43 -0700 Message-Id: <1231349863.7109.83.camel@lappy> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] [PATCH 4/5][RFC] virti-net: Enable filtering based on MAC, promisc, broadcast and allmulti Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: kvm , qemu-devel Cc: Mark McLoughlin 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);