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[Qemu-devel] [6538] qemu:virtio-net: Enable filtering based on MAC, prom
From: |
Anthony Liguori |
Subject: |
[Qemu-devel] [6538] qemu:virtio-net: Enable filtering based on MAC, promisc, broadcast and allmulti (Alex Williamson) |
Date: |
Thu, 05 Feb 2009 22:36:24 +0000 |
Revision: 6538
http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6538
Author: aliguori
Date: 2009-02-05 22:36:24 +0000 (Thu, 05 Feb 2009)
Log Message:
-----------
qemu:virtio-net: Enable filtering based on MAC, promisc, broadcast and allmulti
(Alex Williamson)
Make use of the new RX_MODE control virtqueue class by dropping
packets the guest doesn't want to see.
Signed-off-by: Alex Williamson <address@hidden>
Signed-off-by: Anthony Liguori <address@hidden>
Modified Paths:
--------------
trunk/hw/virtio-net.c
Modified: trunk/hw/virtio-net.c
===================================================================
--- trunk/hw/virtio-net.c 2009-02-05 22:36:20 UTC (rev 6537)
+++ trunk/hw/virtio-net.c 2009-02-05 22:36:24 UTC (rev 6538)
@@ -222,6 +222,31 @@
return offset;
}
+static int receive_filter(VirtIONet *n, const uint8_t *buf, int size)
+{
+ static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+ uint8_t *ptr = (uint8_t *)buf;
+
+ if (n->promisc)
+ return 1;
+
+#ifdef TAP_VNET_HDR
+ if (tap_has_vnet_hdr(n->vc->vlan->first_client))
+ ptr += sizeof(struct virtio_net_hdr);
+#endif
+
+ if ((ptr[0] & 1) && n->allmulti)
+ return 1;
+
+ if (!memcmp(ptr, bcast, sizeof(bcast)))
+ return 1;
+
+ if (!memcmp(ptr, n->mac, ETH_ALEN))
+ return 1;
+
+ return 0;
+}
+
static void virtio_net_receive(void *opaque, const uint8_t *buf, int size)
{
VirtIONet *n = opaque;
@@ -231,6 +256,9 @@
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);
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