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[Qemu-devel] [PATCH 4/5] virtio-net: Enable filtering based on MAC, prom
From: |
Alex Williamson |
Subject: |
[Qemu-devel] [PATCH 4/5] virtio-net: Enable filtering based on MAC, promisc, broadcast and allmulti |
Date: |
Tue, 13 Jan 2009 14:23:54 -0700 |
Signed-off-by: Alex Williamson <address@hidden>
---
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);
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