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[Qemu-devel] [PATCH v3 6/8] qemu:virtio-net: Enable filtering based on M
From: |
Alex Williamson |
Subject: |
[Qemu-devel] [PATCH v3 6/8] qemu:virtio-net: Enable filtering based on MAC, promisc, broadcast and allmulti |
Date: |
Wed, 04 Feb 2009 17:18:22 -0700 |
User-agent: |
StGIT/0.14.2 |
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>
---
hw/virtio-net.c | 28 ++++++++++++++++++++++++++++
1 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/hw/virtio-net.c b/hw/virtio-net.c
index 7e130f7..001169d 100644
--- a/hw/virtio-net.c
+++ b/hw/virtio-net.c
@@ -222,6 +222,31 @@ 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 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 @@ 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);
- [Qemu-devel] [PATCH v3 0/8] qemu:virtio-net: Add MAC and VLAN filtering, Alex Williamson, 2009/02/04
- [Qemu-devel] [PATCH v3 3/8] qemu:virtio-net: Define ETH_ALEN for use when manipulating MAC addresses, Alex Williamson, 2009/02/04
- [Qemu-devel] [PATCH v3 1/8] qemu:virtio-net: Save status and add some save infrastructure, Alex Williamson, 2009/02/04
- [Qemu-devel] [PATCH v3 5/8] qemu:virtio-net: Add promiscuous and all-multicast mode bits, Alex Williamson, 2009/02/04
- [Qemu-devel] [PATCH v3 6/8] qemu:virtio-net: Enable filtering based on MAC, promisc, broadcast and allmulti,
Alex Williamson <=
- [Qemu-devel] [PATCH v3 4/8] qemu:virtio-net: Add a virtqueue for control commands from the guest, Alex Williamson, 2009/02/04
- [Qemu-devel] [PATCH v3 7/8] qemu:virtio-net: Add additional MACs via a filter table, Alex Williamson, 2009/02/04
- [Qemu-devel] [PATCH v3 8/8] qemu:virtio-net: Add VLAN filtering, Alex Williamson, 2009/02/04
- [Qemu-devel] [PATCH v3 2/8] qemu:virtio-net: Allow setting the MAC address via set_config, Alex Williamson, 2009/02/04